imap_path_decode(): err: do not "savestrbuf(,buflen * 2)"

[s-mailx.git] / NEWS

S - n a i l  N e w s
====================

In the following numbers in [] reference either the commit SHA1 hash or
the name of a topic branch which relate to the NEWS entry;
Likewise, numbers after an at-sign @ are mdocmx(7) manual anchor
references which allow directly jumping to the given anchor.
Likewise, but numbers after a number sign # refer to the web manual
(courtesy of grohtml the manuals diverged in the meanwhile).
Commits can be browsed by appending the commit hash to
  https://git.sdaoden.eu/cgit/s-nail.git/commit/?id=

The complete changelog of commits in between two versions can be
inspected by using the git(1) `log' command as shown below, where "OLD"
and "NEW" are the two versions to be compared.

  # All commits:
  $ git log --reverse --topo-order --abbrev-commit OLD..NEW
  # Only topic branch headers (--no-merges for content commits only):
  $ git log --oneline --reverse --topo-order --merges OLD..NEW
  # Same, but truly accessible:
  $ git log --oneline --reverse --topo-order --merges --parents OLD..NEW |
    while read c1 c2 c3 c4 c5 c6; do
      printf "%-24s: \$ git log --oneline --no-merges ${c1} ^${c2}\n" "${c6}";
    done

v14.8.13 ("Cyrustrupidae"), 2016-10-19
--------------------------------------

We are happy to present you an Entomologic sensation, which
counteracts the decline of life that can be seen all around us.
Inspection of environments that mankind hasn't seen since ancient
times reveiled a sofar undiscovered species of dung beetle: the
Cyrustrupidae.

Thanks to Stephen Isard, Ralph Corderoy, Jürgen (Juergen) Daubert,
Lyndon Nerenberg and David Levine
We welcome Lyndon Nerenberg and David Levine in THANKS.

Apologies to Jürgen Daubert (false spelling of name in commit message).

  S-nail will become S-mailx after v14.9, and all project resources
  will move to www.sdaoden.eu with v14.9; only the ML remains hosted
  at Sourceforge.net as of this writing.
  We thank Sourceforge.net for hosting this project so many years!

NOTES, ChangeLog (packager-affine)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- We now support IMAP internationalized names, to be "simulated" via the
  new user command `imapcodec'@135|#_135:

    ?0[tmail ]? imapc enc Trübe/Wölkchen
     in: Trübe/Wölkchen (16 bytes)
    out: Tr&APw-be/W&APY-lkchen (22 bytes)
    ?0[tmail ]? imapcodec decode Tr&APw-be/W&APY-lkchen
     in: Tr&APw-be/W&APY-lkchen (22 bytes)
    out: Trübe/Wölkchen (16 bytes)
    ?0[tmail ]? copy 1 +Trübe/Wölkchen
    "imap://user1@localhost/Trübe/Wölkchen" [New file] 6850 bytes

  Those who were used to get around the missing support by using
  readily-encoded names have to update their resources because passing
  in such a name will result in re-encoding.  [Quite a lot, see below]

- The special handling of *folder*@382|#376 for IMAP boxes has been
  deprecated after introduction of the new *inbox*@396|#_396 variable,
  which will henceforth be regulary used for expansions of "%"
  filenames.  If it is set to the empty string then _only_ that
  special-casing of *folder* is bypassed, and the usual $MAIL /
  compile-time mailspool search is applied. [c220e90,a324bf3]
  (Stephen Isard, Jürgen Daubert)

- Cyrus IMAP servers with their dot hierarchy delimiter should now be
  supported.  The variable *imap-delim*@393|#_393 (and [-USER]@HOST
  variants) will be used to normalize if set, otherwise the first seen
  possible delimiter is used. [a65afca,9e23878,21568f8]
  (Stephen Isard, Jürgen Daubert)

    ?0[tmail ]? Fi+Trübe.............Wölkchen
    IMAP error: Mailbox doesn't exist: Trübe.Wölkchen (0.000 + 0.000 secs).
    #ERR#?1[tmail +Trübe.Wölkchen]? set imap-delim-user1@localhost=/.
  Oh.  Mailbox changed.  Not before v15, sorry.
    ?0[tmail +Trübe.Wölkchen]? Fi+Trübe.............Wölkchen
    "+Trübe/Wölkchen": 1 message [Read only]
    ?0[tmail +Trübe.Wölkchen]? unset imap-delim-user1@localhost
    ?0[tmail +Trübe.Wölkchen]? Fi+Trübe/.............Wölkchen
    "+Trübe/Wölkchen": 1 message [Read only]

git(1) shortlog (edited)
^^^^^^^^^^^^^^^^^^^^^^^^

  44087f3 `z': add ^: goes to first screen; fix max calc for 0 modulos
  1657626 Simplify *folder* (implicit trail solidus) (Stephen Isard, Ralph
          Corderoy)
  7a09af6 `write'++: !interactive: urlxenc() attachment paths (Ralph Corderoy)..

If non-interactive batch mode would be commonly in use i would claim
this to be a security fix, but not yet..  If messages are `write'n out
in non-interactive mode then it is now ensured that attachments end in
the current directory, that they don't overwrite yet existing files, and
that shell pipes won't be executed (after the now applied name
conversion the pipe command ends up as a normal filename).

  c220e90 Add *inbox* (Stephen Isard, and Jürgen Daubert)..
  a65afca Add *imap-delim{,-{{,USER@}HOST}}* (Stephen Isard, Jürgen Daubert)
  8f0f225 IMAP: [a65afca] (Add *imap-delim{,-{{,USER@}HOST}}*) for real now

All as above.

  ba4f26f n_utf32_to_utf8(): fix upper limit (should be 0x10FFFF)
  dfea333 page_or_print(): never use $PAGER unless startup complete
  49fb63f `write'++: !interactive:.. But now, really (Lyndon Nerenberg, David
          Levine)..

As above.

  fcd376f THANKS: David Levine and Lyndon Nerenberg
  57c4ee3 cmd_tab.h: allow history for `unset', `unsetenv' (i.e.: tweak
          [ec81a41])
  9e23878 *imap-delim* if not set, use first delim user gave
  a324bf3 *inbox*: if empty, only bypass *folder* to $MAIL or builtin default
  202b1a6 Add `urlcodec', obsolete `url{en,de}code'
  21568f8 *imap-delim*: aeh, just fix this even for mailbox==NULL
  830f948 IMAP: add support for international mailbox names..
  d015c46 IMAP: fix and tweak previous [830f948]
  583a5bd IMAP cache: tweak previous two, i have forgotten an imap_path_decode()
          call
  2feab02 imap_path_decode(): better approach for [6121ff9]
  36f06cc imap_path_decode(): fix corner case; `imapcodec': makeprint() when
          decoding
  b3803d5 `urlcodec': makeprint() when decoding
  35506b0 imap_path_encode(): sigh.  Finally: do not simply include & in shifted
          walk
  f146b54 imap_path_{en,de}code(): fix iconv_open() to/from charset order

v14.8.12 ("Bubas"), 2016-10-05  (v14.8.11 as of 2016-10-03 broken)
------------------------------------------------------------------

A cumulated bugfix release.
It also brings in some corrections to no-brainers of the past.

Thanks to Antonio Radici, Stephen Isard and Predrag Punosevac.
We welcome Antonio Radici and Predrag Punosevac in THANKS.

Apologies to Stephen Isard, and John Dodson.

  S-nail will become S-mailx after v14.9, and all project resources
  will move to www.sdaoden.eu with v14.9; only the ML remains hosted
  at Sourceforge.net as of this writing.
  We thank Sourceforge.net for hosting this project so many years!

NOTES, ChangeLog (packager-affine)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- The repository layout has been changed / extended!
  Please see README on interest.

git(1) shortlog (edited)
^^^^^^^^^^^^^^^^^^^^^^^^

  f01291d extract_date_from_from_(): dig more invalid MBOXes (Antonio Radici)..
  98050a7 THANKS: Antonio Radici

freedesktop.org obfuscates MBOX From_ lines, and S-nail was much too
strict for quite some time.  This strict behaviour was introduced as
part of the fixes which finally allowed roundtripping messages in
between different mailbox types, but it didn't really work out.

In the future we only warn if we see invalid MBOX files, and will print
the invalid lines with *debug* or *verbose* set, but anyway accept what
we get.

  096809e popen.c:_file_save(): FIX false cherry-pick [41250b1] for IMAP..

v14.8.10 couldn't do "copy * IMAP-SPEC" due to this.

  788aad0 url_parse(): better take better care for path parts (Stephen Isard)..
  fb32f8f IMAP: honour readonly via -R, not only via `File' (Stephen Isard)

Please see below.

  bd6090d sendout.c: fix HAVE_DEBUG From_ quoting..
  e716a9c Many: drop support for *mbox-rfc4155* - a no-brainer..

More on MBOX, as above.

  603a3dd sendmp(), setfile(): FIX: ensure time_current is actualized

Oh!  Yes, there were actually two code paths which suffered a lot from
the "optimize date and time systemcalls" from years ago!  Now fixed. ._.

  63e7ade is_head(): change compat argument to check_rfc4155..

More on MBOX, as above.

  c5b40e4 okeys.h: regenerate (Apologies: Stephen Isard)

Sorry, Stephen!

  3838ffd setptr(): tweak [63e7ade], log more invalid From_'s if verbose

More on MBOX, as above.

  2eb6ca1 mime_types.c:_mt_by_filename(): basename() path (fix/tweak relative
          paths)
  b9599b0 make.rc, mk-conf.sh: WANT_DEVEL includes WANT_DEBUG, but not vice
          versa
  ec81a41 cmd_tab.h: allow history for `set', `setenv', `varshow'

Much better to see them in the `history'.

  a715162 Add a RFC 6068 url_mailto_to_address() hack for List-Post:

We will now strip off any hfield additions after a "?", and we will
perform URL percent decoding before using the value given.
(Is only used for "automatic mailing-list detection".)

  e774dfb imap.c: do not hard error out if FEDIT_SYSBOX|FEDIT_NEWMAIL
  39a7571 FIX "," message specification (since [1c4b8c9], v14.8.4)..

Yes, you can say "f," again, and it should find the parent message.

  171f111 FIX [44cec1f] (Fix "address" message specifications (John Dodson))..

Sorry, Mr. John Dodson of Australia.  They now really work as
standardized with our extensions, and there is nothing anyone can do
to prevent it.

  256da01 *folder*: IMAP: add /INBOX when there is a trailing slash (Stephen
          Isard)
  2afd5c8 Previous, IMAP now for much better (Stephen Isard)
  e5eb5fe Fix + expansion for IMAP, broken since [edb2dcd], 2013-06!!
  ce40a87 imap.c: do not print update message on readonly boxes
  52fcb7e Oops, restore proper *folder* behaviour for non-IMAP
  111f80a FixFix IMAP "+" expansion and more (Predrag Punosevac)

More IMAP fixes.  Should really work now as good as never before.

v14.8.10 ("Anachalcos"), 2016-08-20
-----------------------------------

A cumulated bugfix release.
And because v14.9 still takes time.

Credits to trondd.

Apologies to Sergey and those members of the Roff community which would
like to see progress!

  S-nail will become S-mailx after v14.9, and all project resources
  will move to www.sdaoden.eu with v14.9; only the ML remains hosted
  at Sourceforge.net as of this writing.
  We thank Sourceforge.net for hosting this project so many years!

git(1) shortlog
^^^^^^^^^^^^^^^

Yes, "quick and dirty" only for Anachalcos.

  7f7bae1 Fix `z' (Tim)

Fixes page-wise movement if the argument is greater than 9.

  43ad441 THANKS: update mail address of Tim (trondd)
  8b85b96 Fix compiler warning of [7f7bae1] (Fix `z' (Tim))
  6afff81 FIX possible intwrap caused delays (for mailboxes with size == 1)
  530e81f FIX n_utf8_to_utf32() sequence length checks (since [558d8b8],
          2015-03!)
  78083c0 HTML filter: filter out some characters
  407a705 Actively filter out U+00AD characters (Vincent Lefevre)..
  e5591f2 THANKS: Vincent Lefevre
  5c458cc FIX MBOX append (since ever (nail 11.16, 2004-11-18])!)..

This only fixes invalid non-empty MBOX mailboxes, so "FIX" is possibly
a bit overstated.

  75982b9 bidi_info_needed(): no variation selectors etc. -- CText, where are
          you!
  e65db06 FIX n_verr(): cannot reuse va_list..

Only for error messages > ~2 KB, which we usually don't produce.

  23e8697 Fix *quote-fold* (on GNU/Linux iswspace() does not return boolean!)
  98cf903 FIX: really_rewind() for pre POSIX Issue 7

Hardly affects anyone, i had to look into old v5 FreeBSD: maybe.

  41250b1 FIX: no O_APPEND for .bz2/.xz/*file-hook-load*!  Use lseek(2)!!..

This is the reason for this release, and applies to all C libraries
which optimize fseek(3) and do not adjust the file descriptor via
lseek(2) if the resulting offset is in the I/O buffer.
It seems to enable me to say

    set file-hook-load-xz_pgp='gpg -d | xz -dc' \
          file-hook-save-xz_pgp='xz -zc | gpg -e'

on a GNU/Linux system without ending up with corrupted boxes,
i.e., a complaining gpg(1) that says that says so.

  224d858 popen.c:_file_save(): adjust partial [41250b1] cherry-pick
  87c902a sendmp(): fix possible false insertion of colour reset seq.

v14.8.9 ("Dung Beetle"), 2016-06-21
-----------------------------------

A cumulated bugfix release.

Credits Ralph Corderoy.
Apologies, Dirk-Wilhelm Peters.

  S-nail will become S-mailx after v14.9, and all project resources
  will move to www.sdaoden.eu with v14.9; only the ML remains hosted
  at Sourceforge.net as of this writing.
  We thank Sourceforge.net for hosting this project so many years!

ChangeLog
^^^^^^^^^

- *signature* and tail injections now work correctly even in combination
  with -t. [d4237ac]  (Dirk-Wilhelm Peters)

- Fix faulty (by-one) buffer overflow calculation in the NCL line editor
  that could sometimes be seen when using ^W for backward deleting
  a word when using this at a freshly created rightmost columns.
  Bug was introduced in [d33bd89] (tty.c, NCL: reduce realloc counts,
  2013-08-23).  (Ralph Corderoy)

git(1) shortlog
^^^^^^^^^^^^^^^

b0b974e mk-conf.sh: disable -b for tcc(1) [mob]
a415c58 makefile:_update-release: symlinks do not work with lighttpd, use hard
        ones
2fefb1f collect(): fit ~? output in 25 lines (fixes [5dea8a4,4e61d5c] ;)
7c7c888 mime.types: oops, fix x-xz tbz->txz extension!
c40c206 collect(): hint for `~.' if *ignoreeof* is set, not ".": needs *dot*
d4237ac Fix *signature* / tail injection in conjunction with -t..
ef6a9c2 mk-conf.sh: pcc(1) as of CVS works without stack protectors!
d5cec10 FIX HTML filter: swallow lone ampersands in parameters (SIGH!)..
08eb902 FIX: avoid duplicate output for HTML filter..
524adf4 makeprint(): filter some iswprint()==true, but which really aren't..
552b2b8 `set': fix quoting when printing all variables
aa8df72 mk-conf.sh: fix DEVEL<->DEBUG interdependency; terminate printf(1)
        args
f84b0cd mk-conf.sh: check for the needed environ(3)
b5af710 mk-conf.sh: fix [f84b0cd]: NULL needs stdio.h
fdcbf59 Again "improve" ~? listing
ba29651 FIX: cntrlchar() was broken since [4e49924] from 2012-10-15!!
08ab13f tty.c, NCL fix possible off-by-one (Ralph Corderoy)
815e99f makefile:_update-release: rm TODO in [timeline] _shipout release_ ball

v14.8.8 ("The Vulture 38"), 2016-03-26 (v14.8.7 as of 2016-03-25 broken)
------------------------------------------------------------------------

A cumulated bugfix release.

Credits Gaetan Bisson, Sergey Matveev, Dirk-Wilhelm Peters, Allan McRae
and Ralph Corderoy.
All the mentioned persons deserve special thanks indeed.

We welcome Sergey Matveev, Allan McRae and Ralph Corderoy in THANKS.

  S-nail will become S-mailx after v14.9, and all project resources
  will move to www.sdaoden.eu with v14.9; only the ML remains hosted
  at Sourceforge.net as of this writing.
  We thank Sourceforge.net for hosting this project so many years!

NOTES, ChangeLog (packager-affine)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Thanks to Sergey Matveev the Maildir code is now compatible to *BSD.
  Interested persons may read the commit log. [0c30b14] (Sergey Matveev)

- The (much to restricted) test target should now work if $SHELL is set
  to something "nologin". [7876f3a]  (Gaetan Bisson)

- If *sendmail-no-default-arguments* is set we will NOT (!) terminate
  MTA options with "--", assuming the user does.  This allows, e.g.,
  very sick things like (ouch) [8b0bdbe]

    set sendmail="/bin/ssh" \
      sendmail-arguments="steffen@sdaoden.eu /usr/sbin/sendmail -t" \
      sendmail-no-default-arguments \
      sendmail-progname="ssh"

ChangeLog
^^^^^^^^^

- The primitive builtin HTML filter should now correctly parse HTML
  parameters.  It seems to become necessary ;) [e227a78,65df701]

- *signature* will now undergo MIME encoding. [fe209f7]
  (Dirk-Wilhelm Peters)

- Operating systems without getaddrinfo(3) but only with gethostname(3)
  should be able to resolve DNS (port numbers) correctly again.
  [7dd3a71]  (Allan McRae)

- The builtin NCL no longer counts gabby history limits against the
  given maximum persistent history size unless gabbiness is desired.
  [76780e4,f06ccb6]

- The builtin NCL couldn't paste more than one line since October 2015.
  [ff5d914]  (Ralph Corderoy)

ChangeLog (purely technical)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- WANT_READLINE environments should possibly have a better experience
  hen interactively editing the attachment list. [ede2800]
  (In general interactive situation has to improve a lot.)

- Fix a bit of weird buffer handling. [536d3a7,0f2cc31,e9a5c22]
  (Ralph Corderoy)

- Fix the fixed buffer handling which broke v14.8.7. [3e4831a]
  (Gaetan Bisson)

v14.8.6 ("Hen Harrier II"), 2015-12-28
--------------------------------------

A cumulated bugfix release.

Credits Hilko Bengen, Salvatore Bonaccorso, Martin Sebor,
Aharon Robbins and Philip Guenther.

We welcome all credited persons in THANKS.

NOTES, ChangeLog (packager-affine)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- WANT_AMALGAMATION dependency tracking has been fixed.
  [0ed139d,8c126a9]

- "INSTALL": clarification: "make" OR "make install", NOT "[make &&]
  make install".  More to come in v14.9.  Also INSTALL now says that the
  default configuration includes all non-experimental features, whereas
  the otherwise identical CONFIG=MAXIMAL does include them.
  (Hilko Bengen)

- SENDMAIL will now fallback to /usr/sbin/sendmail if we don't find any
  executable sendmail(1).  We had some similar issue on ArchLinux, but
  i failed to deal with the no-sendmail-available case.  sendmail(1) is
  expected in /usr/sbin on *BSD and according to Debian Policy 11.6.
  [0e09d5e]  (Salvatore Bonaccorso)

- SYSCONFRC no longer includes SYSCONFDIR.  I.e., S-nail now does
    load(SYSCONFDIR "/" SYSCONFRC);
  instead of
    load(SYSCONFRC);
  It seems only CRUX-Linux is affected, and i've sent a patch. [807f64e]

- We now support the TinyCCompiler. [topic/tcc]

- And -- ouch! -- fix S-nail on Solaris, again.  It was broken since
  [3e863c6] (2015-06-23) since necessary linker flags had been
  overwritten. [fd40d5a,6fe5448]
  (We also deal with NAME_MAX being the minimum possible now, see below.)

ChangeLog
^^^^^^^^^

- When `Lreply'ing to multiple messages and using the `~:' tilde command
  the argument list of the `Lreply' itself would have been overwritten,
  resulting in crashs. [9f5c403 (+ 1162af5,5f08362)]

- Temporarily forbid `mbox' but in a system mailbox.  I hope v14.9 can
  perform the action gracefully. [781ee34]

- On systems with "unsigned char" "char"s S-nail was broken for about
  two and a half year since an E(nd)O(f)F(ile) condition would never
  have been satisfied, resulting endless loops.  Detected by the Debian
  package build bot who hung endlessly when running "$ make test".
  [f43e04e]

- Fixes to false signal handler restoration, partially false forever.
  [0948199,364bc48]

- Fix crashes in the error path of Zopen().  If a de-/compressor fails
  Heirloom mailx would crash, and S-nail would have crashed in the debug
  path and print "Alert: Invalid file pointer" in optimized code.  Since
  S-nail allows *file-hook-{load,save}-EXTENSION* the situation is much
  worse, however. [8e7f0f4]

- Don't crash in `varedit' when $EDITOR doesn't start up. [5a5350b]

- The build system now sorts source files in order to honour
  <https://reproducible-builds.org/>. [a939517]

- The build script has seen improvements.  The (mysterious) hangs in VMs
  are gone now that i have switched configuration evaluation to awk(1)
  thanks to a suggestion by Aharon Robbins.  In fact doing "$ make
  CC=tcc devel" now takes the same time all-in-all that the mentioned
  evalution took alone. [fa2e248]  (Aharon Robbins)

  This is true even if we know do a lot more of run tests instead of
  plain link tests for native environment detection since the GNU
  C library monster uses empty ENOSYS stubs for system calls it doesn't
  provide.  This is the reason why the Debian kFreeBSD S-nail package
  doesn't work out by now.  We are not aware of booting different
  kernels with different feature sets than what we detected upon compile
  time, though.  I don't think we ever will. [3ee2d4c]

ChangeLog (purely technical)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Dotlock file locking now ignores lock file creation failures on
  readonly filesystems.  Since the mailbox will be degraded to read-only
  no dotlock file is needed. [40785bc]

  And that really hurts: [3517800]!  On Solaris NAME_MAX is set to the
  minimum that POSIX allows (14), and we were not really prepared for
  that.  I.e., the lock for /var/mail/sdaoden would be
  /var/mail/sdaoden.lock, we require at least one more byte for safe
  lock file creation and yet included the terminating NUL in the
  calculation, and whoops, dotlocking failed because of ENAMETOOLONG!
  So do use pathconf(2) _exclusively_ if that succeeds to give an
  answer.  And we still have room for improvements that i as a C++
  programmer with speedy dynamic Str objects would never thought i have
  to deal with.

- Fix pathconf(2) usage. [31ce3e1]  (Not wrong: Martin Sebor)

- First step to use the new *at() series of system-calls if available,
  inspired by (Philip Guenther). [topic/time]

v14.8.5 ("Hen Harrier"), 2015-09-05
-----------------------------------

Credits John Dodson, Claudio Cappelli.

We welcome Claudio Cappelli in THANKS.

NOTES, ChangeLog (packager-affine)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- I've forgotten to add obsoletion warning messages in v14.8.4, so
  running with enabled -d/*debug* -vv/2x*verbose* may be useful.
  Sorry! [b3e34db]

- A series of bug FIXes (which caused the "Hen Harrier" in the end):

  . v14.8.4 bug: macro content will be added to the history. [28672e5]

  . Fallout of massive not-yet-dead style and control flow change series
    in February 2014, I.: the close-on-exec bit of temporary file
    descriptors wasn't set. [8f58404]

  . Fallout of massive not-yet-dead style and control flow change series
    in February 2014, II.: temporary files were always created in the
    current directory.  Aloha, heh. [edc12c8]

  . v14.8.4 bug: when `resend'ing messages a crash would happen when
    generating the Message-Id: (control flow messed up when hastily
    implementing extended -t parsing). [9e63ae6]
    (Hello, Bob Tennent: i finally have added at least a simple `resend'
    test.  Don't your worry.)

  . v14.8.4 bug: plugged a file descriptor leak in the dotlock code (one
    side of the control pipe was leaked upon success; there you see how
    large ulimit(3) limits are by default today). [ed5c8cf]

- When using -t and a template message recipients given on the command
  line will now be joined into the message instead of being discarded.
  [9eb4cbf]

ChangeLog
^^^^^^^^^

- The `set' command will now mark out assembled variables if *debug* or
  2x*verbose* is set. [2b6e64a]

- Added *smime-cipher* @433 option (i.e., generic variant of
  *smime-cipher-USER@HOST*). [58804ea]

- Messages will now _only_ be saved in *DEAD* if *save* is set (POSIX).
  [3fefac9]

- The (pretty useless for now) `pipe' command will now also print the
  overall message info (it printed MIME part infos already). [e0a8196]

- NAIL_FILENAME_GENERATED is now nothing but a random string. [36097df]

- *debug* now implies no*record* and no*save*. [ca9f512]

- After almost three years i've finally heard what John Dodson said and
  changed/restored behaviour of plain "address" message specifications
  to reflect the original intent (and a bit POSIX) so we now have
    A case-insensitive “any substring matches” search against the
    ‘From:’ header, which will match addresses (too) even if
    showname[339] is set [things are different if *allnet* is set]
  [44cec1f]  (John Dodson)

- ..and therefore we need the possibility to somehow perform "exact
  boundary" matches: for this i've extended the "@" message
  specification with a header-name "~" prefix and header abbreviations:
    ‘f’, ‘t’, ‘c’, ‘b’ and ‘s’ will match ‘From’, ‘To’, ‘Cc’, ‘Bcc’ and
    ‘Subject’, respectively and case-insensitively.
  And:
    This message specification performs full text comparison, but even
    with regular expression support it is almost impossible to write a
    search expression that savely matches only a specific address
    domain.  To request that the content of the header is treated as a
    list of addresses, and to strip those down to the plain email
    address which the search expression is to be matched against, pre‐
    fix the header name (abbreviation) with a tilde ‘~’:
      '@~f@@a\.safe\.domain\.match$'
  [50c2816]

- New option: *sendmail-no-default-arguments* @426 [d983036]
  (Claudio Cappelli)

- Do no longer make a difference in "no mail for user" and "missing
  system mailbox".  The latter caused yet an annoying error message even
  with *emptystart*. [7abff87]

- New command `source_if' @187 is like `source' but don't fails if the
  file cannot be loaded.  That is to say, we do not yet support
  "-f FILE@ tests nor `test -f FILE` shell commands for `if', sigh.
  [893bd5f]

ChangeLog (purely technical)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Unless Gunnar Ritter is directly affected the fourth clause of the BSD
  copyright has been dropped, as has been done for NetBSD Mail.
  [b9ea247]

- Quoted-printable encoding will avoid printing a soft newline if only
  a single character is about to follow. [6b31542]

- The configuration script now shows what it is doing at the beginning,
  to overcome those hangs that can be seen especially in VMs. [4c29cea]

- The configuration will do an automatic "make clean" when the
  configuration had been updated. [9706734]

- We no longer generate a MIME message unless that is necessary.  I.e.,
  a plain 7-bit (US-ASCII) message without attachments send from
  a system daemon is a plain RFC 822/2822/5322 message and doesn't
  require any MIME header. [824257a]

- To avoid that DNS resolver becomes unusable due to ^C interruption.
  Also fixes a possible leak in non-getaddrinfo(3) codepath (old boxes).
  [767897a]

v14.8.4 ("Nameless bird (shot by Hemingway)", 2015-08-04
--------------------------------------------------------

Thanks for Jérémie Courrèges-Anglas for beating me to it.

NOTES, ChangeLog (packager-affine)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Added support for the (BSD-licensed) idnkit[1] IDNA library which is
  now in the base system of DragonFly BSD.  We still only support
  encoding, though.  (And assume the hostname is in locale encoding.)
  [cbded82,22ac479]

    [1] <https://www.nic.ad.jp/ja/idn/idnkit/download/>

- I have rewritten the privilege-separated dotlock helper program,
  because among others a SETGID one is of no use in todays world.
  So it is now SETUID to the new PRIVSEP_USER.

  . WANT_PRIVSEP and PRIVSEP_GROUP have been dropped.

  . New option: WANT_DOTLOCK, by default enabled.
    It is henceforth possible to strip any dotlock code off S-nail.
    So either S-nail has complete dotlock support, including the
    privilege-separated dotlock helper, or none at all.

  . New variable: PRIVSEP_USER, by default "root".
    It must be a privileged user that can be used to implement the new
    strategy: we create the dotlock file and then fchown(2) it to the
    UID and GID of the mailbox that we created it for.  Like this the
    owner of the mailbox (remember %USER, $USER, -u USER ..) will be
    capable to remove the lock file herself.  Or himself.

  . No dotlocking was performed for reading, only for writing.  I've
    changed this.  We also didn't perform any (file) locking at all when
    updating non system-mailboxes, which i have changed, too.

  . Fixed horrific bug: on systems without realpath(3), e.g., Solaris 9,
    S-nail would not resolve symbolic links on the mailbox to lock,
    potentially creating the lock file in the wrong directory.

  . We now compare the inode/device/etc. of the mailbox file with the
    information we collected a lot earlier from the open mailbox file
    descriptor, and bail if they are not identical, to reduce attach
    surface.

  . The privsep helper now re-checks that it is capable to read (or
    read/write) the mailbox it is creating a dotlock for, to reduce the
    chance of being misused (by itself).  I.e., it does so before
    raising its privileges, say.

  [d5ec3cb,b29e2c8]

- The predefined CONFIG=urations have been changed a bit and now
  "require" more options than they did before.

- Renamed WANT_ALL_SSL_ALGORITHMS to WANT_SSL_ALL_ALGORITHMS.
  That was a no-brainer, default of "yes" remains, but it now can also
  be "require"d. [910849e]

- The GitLab project repository URL has been changed and now is
  <https://gitlab.com/sdaoden/s-nail.git> (leave off ".git" for browsing
  purposes).

ChangeLog
^^^^^^^^^

- It has become possible to fixate the input character set of
  attachments from the command line (without going over ~@):
  when the -a @39 option cannot access(2) the file to be attached it
  searches the filename for an equals-sign "=" and splits into filename
  and character set shall it find one.  A character set defined like
  this is "fixated" and therefore no character set conversion occurs.

    $ echo body |
    ./s-nail -d -s subject du@auch \
      -aversion.h -aversion.h=KoI8-r -aversion.h=LaTin1 -aversion.h

  >>> Content-Type: text/x-chdr; charset=US-ASCII
  >>> Content-Type: text/x-chdr; charset=KoI8-r
  >>> Content-Type: text/x-chdr; charset=LaTin1
  >>> Content-Type: text/x-chdr; charset=US-ASCII

  [1f07d9e,804e561]

- In *debug* mode the content of the message that would have been sent
  is printed on standard error not only in *smtp*, but also MTA mode.
  E.g., as in the example above. [c106f35]

- S/MIME oops: S-nail yet didn't test for the "application/pkcs7-mime"
  MIME type at all, but only for "/x-pkcs7-mime" (pre-standardized
  variant), so that S/MIME messages generated by more modern MUAs (e.g.
  Alpine) wouldn't have been understood!
  And we do now use that MIME type ourself, as standardized by RFC
  5751.  However, we are still stupid and don't handle a signed message
  inside a multipart/mixed message, neither do we support fully
  encrypted messages (nothing but rfc822 member) etc. [10c2b16]

- *smime-cipher-USER@HOST* @431 values changed to versions without
  hyphen, as that is what OpenSSL uses: e.g., AES256 not AES-256; the
  latter versions are no longer documented and will be dropped with
  v15.0. [f2c6eec]

- New variable *smime-sign-message-digest* [-USER@HOST] @437 can be used
  to define the message digest for S/MIME signing.  RFC 5751 mandates
  a default of SHA1, by default available are also SHA256, SHA512,
  SHA384 and SHA224, MD5 may be available, dependent on OpenSSL.
  With WANT_SSL_ALL_ALGORITHMS more digests may be available. [2f6dac3]

- Using NAIL_FILENAME_GENERATED was prevented since some time since it
  ended up longer than NAME_MAX (ENAMETOOLONG). [3bcbbfc,f632b5b]

- Heavily rewritten manual section "Signed and encrypted messages with
  S/MIME" @35, giving a ready-to-go example for CAcert.org.

- Nicer output for `help' @126 / `?' @74 when given an argument:
  if that is a command ghost we search for the expansion and do print
  the (further expansion and) help for that if possible [cea8c20]:

    ?0[]? ?save
    save: Append <message-list> to <file>
    ?0[]? ?s
    s (save): Append <message-list> to <file>
    ?0[]? gh s s
    ?0[]? ?s
    s -> s (save): Append <message-list> to <file>

- No longer allowing recursive commands in macros to avoid that the
  following can crash us (check can be bypassed):

      ? define ouch {
        echo ouch
        reply 2
      }
      ? reply
      ~:call ouch

  This is a pity because "? call ouch" does no longer cause a reply,
  but the real healing will take time.
  Also the `source' command is now actively disabled during macro
  evaluation -- this only works(/ed) by accidence and anyway non-
  synchronously (the `source'd file will be loaded after the macro
  evaluation has finished).  The real healing for this is heavy stuff
  and will remove a smart and fantastic idea from before 1979, but it
  won't work out with macro support (see commit message for more upon
  interest). [5461a30]

- And `source' will be actively forbidden in compose mode, too.  It
  never worked the way it should. [abd388c]

- Did -t @60 ever work for real?  Now it does.
  Even better it now "supports" some more header fields (References:,
  In-Reply-To:, Message-ID:, and Mail-Followup-To:, but the latter will
  be subject of a nice followup content massage) -- S-nail can
  henceforth be used for git(1)s send-email command.
  We also improved the interdependency of -t (with[out] From:, Sender:),
  -r, *from* and *sender*, but i don't say it is perfect yet.
  [6842f12,631d402,a86ca2d]

- Completely reworked *expandaddr* @373 handling, and you can now define
  *exactly* what you want, e.g., "fail,-all,+addr,+file" will only allow
  mail address or file recipients and hard error out otherwise.
  Note that in order to make that work "restrict" has been changed to be
  effectively "restrict,-all,+name,+addr", which matters in, e.g.,
  "fail,-all,+file,restrict" which therefore truly is "restrict,fail"!

  Even in conjunction with -t you should now see proper (-d / *debug*,
  -v / *verbose*) messages for *expandaddr* caused address stripping,
  or, with "fail", hard errors. [8668be3]

ChangeLog (purely technical)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- We again allow Message-Id:s to start with a leading slash, as in
  "/p/forge/site-support/10.../...". [143372a]

- We now support multiline values in make.rc: to do so, escape the
  newlines with a backslash "\", e.g. [621cbed,9cf4e7b]

    MAILSPOOL=`\
       if [ -d /var/spool/mail ]; then \
          echo /var/spool/mail;\
       else \
          echo /var/mail;\
       fi`

- Lowered the memory pressure caused by malicious spam messages that
  place hundreds of references into the References: header body.
  And we don't use alloca(3) no more for such things, in order to lower
  stack usage. [1c4b8c9,47a1a5c]

v14.8.3 ("Startled chicken"), 2015-07-05
----------------------------------------

Credits go to Martin Neitzel!

NOTES, ChangeLog (packager-affine)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Prefilling INCS and LIBS is finally honoured by the build system, just
  as documented. [9a34822]

- In place of "packager-install" "doinstall" will also do.

- New `make.rc' option: WANT_ERRORS, by default enabled.
  Will enable the new command `errors' @105 (#_105) and an error message
  queue ring: error messages will no longer get lost but duplicated into
  the queue, to be displayed in interactive mode via `errors'.  This is
  a finite ring which rotates oldest messages if it full.
  [topic/errors]

- S-nail no longer offers hooks for group identity switching: it no
  longer makes sense to install it SETGID to a mail group (shall anyone
  has done so). [ac42d24]

- New `make.rc' option: WANT_PRIVSEP, by default enabled.
  The dotlock'ing has been completely rewritten (see `make.rc' for
  a longer explanation of traditional Unix mailspool locking, please).

  In order to be able to create lock files in *any* SETGID mailspool
  directory in which user system mailboxes may reside S-nail now ships
  with a privilege-separated mini dotlock program (source in
  `privsep.c'), which will be installed in the new also LIBEXECDIR (as
  YOUR_MUA_NAME-privsep) SETGID to the group given by the also new
  PRIVSEP_GROUP (default "mail").

  This dotlock program will be used whenever a mailbox has to be
  dotlocked which is owned by group that is not the group of the user
  who is running S-nail, assuming that the file in question resides in
  a SETGID mailspool directory.

  The new variable *dotlock-ignore-error* @294 (#_294) now controls
  wether it is a failure if creation of a dotlock file is not possible.
  This variable is by default enabled if WANT_PRIVSEP is false.
  [topic/dotlock]

ChangeLog
^^^^^^^^^

- Fix file locking, which was broken since v14.8. [7f8ebc0]
  (Martin Neitzel)

- -e now works with given boxes; -e is mutual exclusive with -H and -L;
  and then any of -e, -H and -L causes the mailbox opened in readonly
  mode. [3bb05a2, 2cf15c1]

- In *debug* mode no process will be started for a set *smtp*, but
  instead the message will be directly generated (on the error channel).
  Also GSS-API authentication will no longer be performed even with
  enabled debug, oops. [3333d71]

ChangeLog (purely technical)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- A readonly IMAP box is opened via EXAMINE not SELECT. [2d5259c]

- snprintf(3) and vsnprintf(3) are now required preconditions. [c58c7e9]

v14.8.2 ("Wandering albatross"), 2015-06-17
-------------------------------------------

Many thanks Bob Tennent, for reporting and testing!

NOTES, ChangeLog (packager-affine)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Configuration will now find clock_gettime(2) in -lrt and
  gettimeofday(2) as such on Linux. [47c9ea7,5e248d2,df7d77f]
  (Bob Tennent)

- MANDIR now defaults to ${PREFIX}/share/man (not ${PREFIX}/man)
  [6371740]

ChangeLog
^^^^^^^^^

-  Added missing condition clause in `if' expression parsing
   [74c7cac,5da6d4d]:

    ?0[ +mbox]? if $du @@ hey
    ?0[ +mbox]? endif
    -->
    ?0[ +mbox]? if $du @@ hey
    `if' conditional: unrecognized condition -- near "du"
       Expression: $du @@ hey
       Left to parse: $du @@ hey
    ?1[ +mbox]? endif

- Ooops, fix pipe-TYPE/SUBTYPE @403 with value "@" (a.k.a. treat as
  plain text and display "as is"): i've broken that once i've introduced
  the extended type markers for the `mimetype' command.  Must have been
  a Freudian error, sorry! [ea655de]

- Fix a bug introduced in nail 9.29, 2001-12-10: a temporary buffer is
  closed with fclose() even though it is a registered file that instead
  needs to be closed via Fclose().  This effectively results in
  a double-fclose(3) of the underlaying file descriptor once the
  registered files are cleaned up next, which happens either after
  signal interruption and, since [65e0510] as of 2015-05-21, whenever
  the command loop ticks. [97fcb97]  (Bob Tennent)

v14.8.1 ("Tristan albatross"), 2015-06-11
-----------------------------------------

Kudos!
Ypnose, Tarqi Kazan, Dagobert Michelsen and OpenCSW.org, Gianluca
Ramunno, Bob Tennent.

We welcome Dagobert Michelsen in THANKS.

NOTES, ChangeLog (packager-affine)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

$ In all the following noticable changes to the release candidate are
$ marked with a $ in the first column

- We have been ported to Sun Solaris!
  Thanks to Dagobert Michelsen for giving me an account on OpenCSW.org!

- The build system will now really find strip(1). [54e91c4]

- WANT_TERMCAP fix: we simply passed tputs(3) a pointer to putchar(3)
  though that may be a macro etc. [cc65bc3]

- The following variables can be used to overwrite utilities needed
  during configuration and build:

    MAKE=, STRIP=, awk=, cat=, chmod=, cp=, cmp=, cksum=, grep=, mkdir=,
    mv=, tee=, rm=, sed=, tr=

  Note that rm(1), sed(1) and tr(1) are needed before `make.rc' is read.
  Fix: these will now also affect "make test".

- WANT_AUTOCC now no longer sets compiler flags as of experience, but
  compiles a test program to actually detect wether the compiler will
  swallow the flag.  This increases configuration time quite a bit.
  Users who really did use "make devel" possibly want to use "make
  CONFIG=DEVEL" followed by "make build" now.
  Note we now also test for -fPIE as well as relro,now,noexecstack.

- WANT_SPAM_SPAMD is now decoupled from WANT_SOCKETS. [d247d86]

- The configuration now also detects any changes on PATH, C_INCLUDE_PATH
  and LD_LIBRARY. [1038028]

ChangeLog
^^^^^^^^^

- Fixed importing of SHELL/LISTER/PAGER variables from the program
  environment. [940c7f1]  (Ypnose)

- Moved -X @64 command line option handling before attachment
  evaluation, so that, e.g., `mimetype's registered via it will already
  be seen when classifying attachments. [5d9742f]

- Honour *asksign* @274 again, even if *askatend* @270 or *bsdcompat* @281
  are not set.  This also changes *askattach* @271 as we'll only ask for
  addition of attachments if there are none yet. [e054d6a]  (Tarqi Kazan)

- Support OpenSSL 1.1.0 and above: it obsoletes the more-than-a-decade
  old SSLv23_client_method() in favour of a new TLS_client_method()
  (instead of using some "magical" constant like, say, "SSL_METHOD_ANY",
  but who am i). [c35b567]

- Generic file (mailbox) load and save hooks have been introduced:
  *file-hook-(load|save)-EXTENSION* @374,@375, e.g.:

    set file-hook-load-xy='echo >&2 XY-LOAD; gzip -cd' \
        file-hook-save-xy='echo >&2 XY-SAVE; gzip -c' \
        record=+null-sent.xy

  One could think about using all-encrypted mailboxes, or the like.
  Note that before v15.0 these variables may not be changed while
  a mailbox handled by these hooks is open. [b4c2c37]  (Tarqi Kazan)

- When DNS resolving fails we now print error messages.
  And then, if it fails because of an unknown service (protocol), we
  check for the protocol and retry shall we have a well-known port
  number builtin (smtp, submission, smtps, pop3, pop3s, imap, imaps).
  [5f52370, (3f189f9)]  It is not wrong to credit (Gianluca Ramunno)

- One may now force treatment of addresses as files with the new "./"
  or "/" prefixes -- until now it wasn't possible to address files if
  the addressee includes an at sign, now "./me@here.com" will do, just
  as will "/me@here.com". [2cf5890,0da473f]  (Bob Tennent)

- Fix *record-resent* @329, which never made it to *record* @414 since
  [a11935b], but instead save the message in a file named after the
  addressee! [a82af9f]  (Bob Tennent)

- Fixed signal handler uninstallation in sopen() (DNS lookup and socket
  creation): v14.8.0 could be forced in endless loop after failed DNS
  lookups due to this. [3cca23b]

- Fixed possible double-free (causing a crash) after failed SSL
  certificate verification (*ssl-verify*=strict etc.) with OpenSSL
  versions that support SSL_CONF_CTX (1.0.2+). [c691726]

- Assorted changes:

  . The builtin HTML filter will now silently discard carriage-return
    characters (looks better in e.g. less(1)). [cf4d800]
  . When reopening the same box we now recognize if changes had been
    written, forcing a reread of the box in order to display the actual
    real content. [7dfbd38,0835212,a15dfed]
  . `netrc' output changed, so that the output could (in theory) be fed
    back into S-nail again in order to gain the same settings. [a9a2722]
  . *pop3-keepalive* @410 gained (@USER)?-HOST forms [69cae68]
  . *imap-keepalive* @387 gained (@USER)?-HOST forms [9a8c929]
  . Do not use the builtin random generator if we find a suitable one in
    the host environment. [0e01aeb,6bcb430,fc846c6]  (Bob Tennent)
  . The builtin HTML filter will now also expand entities in parameter
    names. [8d16dc0]
$ . *crt* will now only be checked when attached to a terminal device;
$   and no*crt* will now be honoured. [2508c32]

ChangeLog (purely technical)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

- Solaris port resulted in a lot of changesets for the build system.
- I didn't use git(1) rebasing and the [crawl] branch but only [master].
  And see where that ended: S-nail would have 10000 fossil commits!
- Plugged some memory leaks.

v14.8.0 ("Albatros"), 2015-04-30
--------------------------------

Puuuh!
I'm glad and happy to announce "Albatros" after about seven months of
development.  Development that brought many new features, bugfixes,
technical overhauling and behaviour tweaking.  Shall you ever have been
interested in BSD Mail or its deriviatives you might want to give it
a try.

"Albatros" is indeed the first version of the codebase as such that
should allow IMAP->Maildir->MBOX->Maildir->IMAP message roundtripping
without causing possible message splitting due to faulty From_
detection / encoding.  It also generates compliant MIME parameters.

Note there are incompatible changes, documented below.  And it is also
advisable to try out existing configurations with enabled *debug* and/or
*verbose* (-d, -vv) in order to check for "obsoletion" warnings.
(Here "obsolete" would refer to v15, of course.)

Credits and Thanks go to Ypnose, Jérémie Courrèges-Anglas, Josef Jurek,
Gavin Troy, Rich Salz, Martin Brandenburg, Bob Tennent, Dominic Meskys
and Peter Bray.

We welcome Jérémie Courrèges-Anglas, Josef Jurek, Rich Salz,
Dominic Meskys, Peter Bray, Dirk-Wilhelm Peters and Martin Brandenburg
in THANKS.
Apologies to Dirk-Wilhelm Peters and Martin Brandenburg whom i had
forgotten to add to THANKS at first glance once i've added this file; it
was nothing but an oversight.

I also say «Thank you» to GitLab.com – i've mirrored the S-nail git(1)
repository (alongside others) to this free service.

Credits finally also have to go to Coverity.com [1] which helped to find
some bugs; the claim of a 0.00 defect density after a Friday 13th test
must have been an error from their side, though, as well as that the
page [1] still remains at a test with a defect density of 0.01, since
i've posted yet another run that must have ended with 0.00.  (Note the
codebase was tested without IMAP code, i.e. my _next_ developer branch.)

  [1] https://scan.coverity.com/projects/444

NOTES, ChangeLog (packager-affine)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

$ In all the following noticable changes to the release candidate are
$ marked with a $ in the first column

+ Crawling along the path of CVE [topic/cve-2014-7844.2]: to enable MTA
  arguments after -- the new *expandargv* @372 must be set.  More below.

+ Even more crawling along the path of the CVE i decided to replace the
  wordexp(3) based shell word expansion mechanism with an entirely new,
  internally implemented restricted one, but complete mitigation will
  take time.  This has consequences in respect to backslash escaping in
  file names (shall you ever have used such a filename with S-nail and
  its predecessors, of course, and only ...).
  Please see [topic/fexpand.2] below.

+ A new member for the *attrlist* @351 variable (for unsure spam status).
  Since a user setting with a false length will be ignored yet causes an
  error message this is a backward incompatible change. [topic/spam.2]

- New make.rc option: WANT_ALL_SSL_ALGORITHMS (enabled).
  See make.rc and *smime-cipher-USER@host* @427 below. [topic/ssl.1]

- The make.rc option WANT_IPV6 is gone; we use the respective standard
  library facilities automatically whenever possible. [999e79a]

- New make.rc option: WANT_TERMCAP (disabled).
  See *term-ca-mode* @345 below.  [topic/termcap]

- The make.rc option WANT_SPAM has been dropped.  Instead we have (see
  [topic/spam.2] below for more):

  . WANT_SPAM_SPAMC (default off):
    Rather identical to the former WANT_SPAM (interaction with spamc(1)
    from spamassassin(1)), but internally improved.
  . WANT_SPAM_SPAMD (default off):
    Direct interaction with spamd(1) from spamassassin(1) via a local
    unix(4) domain socket.
  . WANT_SPAM_FILTER (default on):
    Freely configurable hook programs, e.g., bogofilter(1).

- It turned out that the manual wasn't mandb(1) compatible. [f5ab838]

- New make.rc option: WANT_FILTER_HTML_TAGSOUP (enabled).
  S-nail now ships with a very primitive HTML-to-text converter.
  It'll be used for HTML parts automatically if no pipe handler is
  installed (and the builtin mime.types haven't been changed).
  This works because of the new TYPEMARKER extension to mime.types(5) as
  documented for [topic/mime.types.2] below.
  (It is quite experimental but i think it rocks except it can be fooled
  since it doesn't know about double quoted strings, e.g., <a href=""
  onmouseover='javascript:alert("> This is plain text you see, oops");'>.
$ Yet it is ment for displaying HTML mails, and it works really well.
$ It doesn't support non-standard type="quote" attributes nor even-more
$ non-standard CSS classes "gmail_quote" or whatever it's name was --
$ these are used in the wild to generate automatic mail quoting, which
$ has resulted in an immense amount of top-posting; but maybe there will
$ be a S-nail v14.8.1 which will implement those, to ease the pain.
  [topic/html-tagsoup]

$- List output of `alias' @78, `ghost' @123 and `shortcut' @181
$ uses a new syntax that should (in theory) make it possible to feed
$ the output back into S-nail. [2913df3]
$ Ditto `set' @178 unless *bsdcompat* or *bsdset* are set. [373cc8a]

$- *keep* @308 will also affect secondary mailboxes (because *emptybox*
$ has been obsoleted, see below). [5fa5f8b]

$- New make.rc option: WANT_FORCED_STACKPROT (enabled with WANT_DEVEL or
$ WANT_DEBUG).
$ In conjunction with WANT_AUTOCC this will trigger stack protectors
$ if the detected compiler does support them.  (Before they were only
$ enabled if WANT_DEBUG was set, automatically.)

+ v14.8 is the last release with IMAP support, which has been removed
  from the developer's [crawl] branch for quite some time already.
  He really hopes he can affort to readd support sometime after v15.0.

ChangeLog
^^^^^^^^^

- S-nail now knows about named booleans (e.g., `localopts' @133 or
  interactive approval prompts can now be given any of 1/yes/true/on or
  0/no/false/off, case-insensitively; note this is true for the make.rc
$ system, too) and so-called "quad" options (either normal boolean or
$ "ask-BOOLEAN", which, in interactive context, will be prompted with
$ default values; the default value is chosen in non-interactive mode).
$ (on/off support not in the RC.)
  [topic/xify]

- The `if' @128 combo:

  . gained <, >, <= and >= tests;
    ==, !=, <, <=, >=, > will try to convert their arguments to numbers
    and perform their test numerically, if possible, [143d409]
  . `if' supports boolean (as above) arguments, [topic/ifpimp]
  . `if 1'+ return value fixed, [topic/ifpimp]
  . `if'+: on syntax error, NOOP anything 'till `endif', [topic/ifpimp]
  . `if'+ now support bracket groups, AND-OR lists and unary ! (not),
    note that the separating spaces are required: [topic/ifpimp]

      if [ [ true ] && [ [ $debug ] || [ $verbose ] ] ]
        echo Noisy, noisy
      endif
      if true && $debug || $verbose
        echo Left associativity, as is known from the shell
      endif
      if ! ! true && ! [ ! $debug && ! $verbose ]
        echo Unary operator support
      endif

  . `if'+ now support new case-insensitive (ASCII) substring operators
    =@ and !@: [topic/ifpimp]

      if $features =@ "regex"
        if $TERM =~ "^xterm.*"
          echo ..in an X terminal
        endif
      endif

$ . `if'+: the three argument forms can now be given variables also on
$   the right hand side: [topic/ifpimp]
$
$     set xtest='^xterm.*'
$     if $TERM =~ $xtest
$       echo Variables as right hand value
$     endif

- `unalias' @198 learned that * means "all aliases".
  Fixed: faulty list-head relinking caused "dead" aliases (since ever)
  [topic/names]

- `unshortcut' @219 learned that * means "all shortcuts".
  `shortcut' @181 in turn can now define multiple shortcuts in one go
  [topic/names]:

    ?0[ /var/mail/steffen]? sho you 'any one' me 'no "one"'
    ?0[ /var/mail/steffen]? sho
    shortcut me "no \"one\""
    shortcut you "any one"
    ?0[ /var/mail/steffen]? unsho*
    ?0[ /var/mail/steffen]? sho
    ?0[ /var/mail/steffen]?

- S-nail learned how to deal with mailing-lists in respect to
  Mail-Followup-To headers etc. (manual: "Mailing lists" @21):

  . new commands `(un)?ml(list|subscribe)' to let S-nail decide which
    addresses are mailing-lists, [topic/names]
  . *headline* learned %T format to display message recipient flags:
    "L" for a mailing-list, "S" for a subscribed one, [topic/names]
  . new variable *followup-to-honour*, [topic/mft]
  . new variable *reply-to-honour*, [topic/mft]
  . new command `Lreply', forcing a list-only `reply' if possible.
    When `Lreply'ing to messages which seem to originate from
    mailing-lists (contain a "List-Post:" header), then S-nail will
    treat the list address as a known mailing list (as via `mlist').

    (It is advisable to try out several different combinations of non-/
    subscribed mailing-lists in conjunction with `reply', `Reply' and
    `Lreply' with *debug* set in order to get used to how S-nail will
    modify the address lists; the results should be quite logical
    though.) [topic/mft]
  . For convenience `reply' and `Lreply' can now be used to reply to
    multiple messages in one go (each message will still be handled by
    itself, we simply start over internally). [topic/mft]

- `unset' @217 no longer "fails" for unset variables, but only prints
  a message in *debug* or *verbose* mode.  This changes traditional,
  decade-old behaviour, but shells don't even say something in (*debug*
  or) *verbose* mode, and it really simplifies things. [topic/okeys-attr]

- SSL/TLS changes: [topic/ssl.1]

  . new variables: *ssl-cert-HOST* @451, *ssl-key-HOST* @456,
    *ssl-method-HOST* @457, *ssl-verify-HOST* @461,
  . *ssl-v2-allow* has been dropped,
  . *ssl-verify* @461 and *smime-cipher-USER@HOST* @427 use
    case-insensitive matching for value checks,
  . new variable-chain: *ssl-protocol* @458 (the introduction of which
    obsoletes *ssl-method* @457, see below),
  . new variants of *ssl-cipher-list* @452: *ssl-cipher-list-USER@HOST*,
    *ssl-cipher-list-HOST*,
  . new variable: *ssl-config-file* @453,
  . *smime-cipher-USER@HOST* @427 dropped builtin support for the
    obsolete RC2-40 and RC2-64 ciphers -- use the make.rc option
    WANT_ALL_SSL_ALGORITHMS to readd support,
  . with SSL_CONF_CTX support (OpenSSL v1.0.2+) the values of the
    following variables (and variants) will be parsed by OpenSSL instead
    of S-nail, offering more user and packager flexibility:
    *ssl-cert* @451, *ssl-cipher-list* @452, *ssl-key* @456,
    *ssl-protocol* @458.

    E.g., shall a new OpenSSL ship with TLS v1.3 S-nail doesn't need to
    be adjusted in order to support TLS v1.3, all there is to do is that
    the user has to adjust her *ssl-protocol* setting.
    This is at least the theory. :)
    And maybe OpenSSL (will) offer(s) symbolic constants like "NEWEST"
    or "SAFEST".

- Folder hooks have been extended:

  . if there was no *folder-hook-FULLNAME* @376 we'll try
    *folder-hook-+NAME* if the mailbox NAME resides in *folder*, e.g.,
    the author has "folder-hook-+sent=MACRO" and all his *record*
    variables are "record=+sent", therefore MACRO can be shared in
    between all accounts with a single hook definition. [a5a4d89]
  . `localopts' @133 can now be used in folder hooks: the covered
    settings will be reverted once the folder is left again.
$   (I know for sure someone asked for this long ago, directly after
$   `localopts' came up first, but i couldn't find the corresponding
$   message.  Sorry!) [2c67091]

- More security control à la CVE 2014-7844, possibly for the first time
  enabling safe usage of S-nail via CGI: [topic/cve-2014-7844.2]

  . fixed *sendmail-arguments* @420 parsing:
    *sendmail-arguments*='-F "Dubi Da"' will now result in <"-F" "Dubi
    Da"> not <"-F" ""Dubi Da"">,
  . new command line argument "-." @67 forcefully terminates options
    and enters send mode.  I.e., using this option avoids possible
    misinterpretation of the following arguments.

    This operation is usually reserved for --, but since S-nail passes
    anything after -- to the MTA (but read on) i had to invent something
$   else.  Also, -. forcefully enters send mode, which -- couldn't have
$   been overloaded to do.
  . New variable: *expandargv* @372: in equal spirit to *expandaddr* @371
    this one is required in order to pass arguments after -- to the MTA.
    If set to "fail" existence of such arguments is a hard error,
    "restrict" likewise except in interactive mode or in conjunction
    with the -~ or -# options.
  . *expandaddr* @371: new special value "fail" causes presence of
    extended recipient addresses to be treated as a hard error.
$   In fact this is now interpreted as a comma separated list and may
$   also include the string "noalias", disallowing non-network-addresses
$   in the remaining (non-"extended") recipient addresses -- note this
$   applies to system global aliases only, not to those of `alias'
$   (except for their content, of course); "noalias" is a hard error in
$   combination with "fail".

- `unaccount' @197 and `undefine' @201 learned that * means "all
  accounts" and "all macros", respectively. [4c09114]

- Spam handling has been rewritten completely, revealing a very old
  misbehaviour in nail's subprocess handling (malloc in signal handler).
  Please reread the manual section "Handling spam" @37 for more.
  The motivation was also that bogofilter(1), sylfilter(1) etc. can
  export their databases, so should the author ever find time to
  implement spam handling in C like his predecessor it will be possible
  to continue to use those databases: [topic/spam.2]

  . *headline* @380 format %$ has been fixed,
  . when working on multiple messages the operation is cancelled if an
    error occurs,
  . new variables: *spam-interface* @436 chooses the, well, ...
    This one has extensive documentation.  Plus the interface dependent
    *spamc-command* @438, *spamc-arguments* @439, *spamc-user* @440,
    *spamd-socket* @441, *spamd-user* @442,
    *spamfilter-ham* @443, *spamfilter-noham* @444,
    *spamfilter-nospam* @445, *spamfilter-rate* @446,
    *spamfilter-spam* @447 and *spamfilter-rate-spamscore* @448.
  . The *attrlist* @351 variable gained a new slot for an unsure-spam
    status (default character is ~).
    Messages with that flag can be specified via the :S colon modifier.

- Fix: even though -# @66 implies *sendwait* @335 a user should have the
  option to turn *sendwait* off again. [4274bed]

- Completely reworked mime.types(5) handling, note the backward
  incompatible drop of `mimetypes': [topic/mime.types.2]

  . dropped the `mimetypes' command,
  . new commands: `mimetype' @138 and `unmimetype' @209,
  . *encoding* @369 is now parsed case-insensitively,
  . *mime-counter-evidence* @390 gained new bit 3 to indicate the desire
    to forcefully overwrite MIME types if we think we know it better,
  . *mimetypes-load-control* @391 gained an extension that can be used to
    load more and specific files, which in addition may make use of
    a new non-portable S-nail-specific TYPEMARKER extension.  The manual
    section "The mime.types files" @32 has been rewritten accordingly.
    (In short: mime.types(5) lines can be prefixed by @, @h@ or @H@, for
    plain text, builtin HTML filter (plain text fallback), ditto
    (without fallback).)
$ . The builtin MIME types now make a lot of use of the @ and @h@
$   TYPEMARKER extensions, so that you possibly can get rid of a lot of
$   pipe-TYPE/SUBTYPE=@ plain-text type hooks, shall you have used them.

- Support for RFC 2231 has been added.  This means that S-nail generates
  truly MIME compliant messages and no longer requires help from other
  MUAs!  In fact MIME parameter handling has been rewritten completely.
  [topic/rfc2231]

- On the long run shell word expansion (via wordexp(3)) will be replaced
  by a new, restricted (and thus (hopefully) safer), internally
  implemented path expansion mechanism that only supports ~/ -> HOMEDIR
  and $SHELLVAR / ${SHELLVAR}.
  Since the original expansion is *so* hardwired that'll take time, for
  now it is used for attachments only, but here all through the way.

  But where it is used already it has consequences regarding backslash
  escaping; to improve user experience a bit `~@' @239 will display the
  escaped filename so that users only have to hit ENTER to accept paths:
  e.g., "diet\ is \curd.txt" will show up as "diet\\ is \\curd.txt".
  And, e.g., the test script does the following for RFC 2231 (excerpt):

    MAILRC=/dev/null "${SNAIL}" ${ARGS} -Snodot \
      -a "ma'ger.txt" -a "mä'ger.txt" \
      -a 'diet\\\ is\ \\curd.txt' -a diet \"is\" curd.txt \
                                         ^      ^ NOTE: 0x00A0, NBSP
      -a ✆✆✆✆✆✆✆✆✆✆✆✆✆✆✆✆✆✆✆✆✆✆✆✆.txt

  The introduction of the manual section "COMMANDS" @5 has been updated
  accordingly.  Also see -a @39.  [topic/fexpand.2]

- Assorted changes:

  . Multiple crash-causing bugs regarding `source' @185, also if used
    via `~:source', have been fixed. [aafb688,6979c73,4c6dfc2]
  . The NAILRC environment variable is no longer supported. [104c254]
  . The *Replyall* variable has been dropped as it was only an alias
    for the POSIX standard *flipr* @296 variable. [topic/mft]
  . New variables: *version*, *version-(major|minor|update)*,
    *features*. [topic/okeys-attr]
  . `varedit' @224 can be used to create variables. [topic/okeys-attr]
  . New variable: *charset-unknown-8bit* @357. [9b672f6]
  . *smtp-auth* @434 now defaults to "plain" (if *v15-compat* is set).
    (Josef Jurek, Gavin Troy) [dcbb31a]
  . All obsoleted: *autothread*, `thread' and `unthread'.
    Use *autosort*=thread, `sort thread' etc. instead. [ef16f43]
  . *showlast* @336 should have gained meaning. [4213d52]  (Gavin Troy)
  . If the -r @57 option is given a full name specification (rather
    than only an address), pass the MTA the respective address parts
    via -F and -f. [dd90c14]
$   Also try to pass -F _and_ -f if an empty argument was given to -r
$   but *from* @378 (or, say, "From:") includes a full name. [5f68921]
  . New variable: *term-ca-mode* @345 (for WANT_TERMCAP).  In
    interactive mode S-nail can now be forced to use ti and te termcap
    entries; in conjunction with a PAGER that does too ... [topic/termcap]
  . `ghost' @123 gained a new mode and tweaks (see manual). [8a49b12]
  . -r @57 option: fixed -h output and manual. [9a1a303]
    (Martin Brandenburg)
  . With *debug* or 2x *verbose* command lines (including those read
    from files) are now traced. [06042c4]  (Bob Tennent)
  . NAIL_TMPDIR (new) and TMPDIR environment variables are now
    (guaranteed to be) set in pipe hooks. [a1cfb02]
  . "Subject:" Re: trimming: MIME decoding is now performed. [ede7c7d]
  . New variants of *pop3-bulk-load* @320: *-[USER@]HOST*. [5f5ae10]
  . *crt*=0 @366 now really works. [22f1477]
  . Maildir code now uses string relaxation which drastically reduced
    memory usage for large mailboxes. [d1c945f]
    And for the first time it performs real memory cleanup. [e549110]
  . Improved error message on MTA exec failure.  (Dominic Meskys)
  . Fix: "setenv noVAR" would have set noVAR. [3c1f886]
  . When `setenv' is used to set any of HOME, USER, TMPDIR it'll be
    reflected by our internal variables.  (Still hacky as special code
    is needed to do so; also "set HOME=x" shadows HOME for "varshow
    HOME" instead of being rejected.  Future cleanup work.) [3f03b80]
  . Colon modifiers can now be joined, as in "f :uas". [8b6c259]
$ . Maildir code did faulty From_ line detection, resulting in any
$   non-quoted "From " line to start a new message (e.g., when doing
$   things like "copy * MAILDIR" we could have f...ed up completely).
$   Seems to have been added with Heirloom mailx 11.6 ([faf4b65],
$   2004-09-07).  Neither goes credit to Jacob Gelbman nor to Robin
$   Stjerndorff for messages to nail-devel@ on 2015-01-21 and
$   2015-02-20, respectively.  :-)) [ae539c9]
$ . *emptybox* has been obsoleted.  *keep* @308 will also affect
$   secondary mailboxes, and then both only deal with local regular
$   MBOXes anyway, not to e.g., maildir files nor IMAP boxes. [d747c0a]
$ . `unghost' @207 learned that * has to drop all ghosts. [34a92a5]
$ . NAIL_TMPDIR (new) and TMPDIR environment variables are now
$   (guaranteed to be) set for *agent-shell-lookup* @350. [5c3d7b5]
$ . Things like "copy * MAILDIR" from within an IMAP (or POP3?) mailbox
$   to a Maildir mailbox should now work again. [d747c0a]
$ . IMAP code did faulty From_ line detection, resulting in some
$   non-quoted "From " line to start a new message (e.g., when doing
$   things like "copy * MAILDIR" we could have f...ed up completely).
$   Present in Heirloom mailx since ever ([^b4ad9f2]). [66e3c93]
$ . New variable: *mbox-rfc4155* @312: because of all the bugs in From_
$   quoting etc., err, no.  "Albatros" will last.  I've just touched
$   a lot of stuff regarding MBOX writing: From_ quoting (which may
$   happen whenever we save already existent data in a MBOX, shall
$   the original generator not have taken appropriate steps to ensure
$   "false" From_ lines can't happen (S-nail does)) is now definitely
$   POSIX compliant, meaning that we may quote much too much lines.
$   So set *mbox-rfc4155* and we generate RFC 4155 compliant MBOX files,
$   possibly leaving behind backward POSIX-only software. [70ba3ef]
$ . New command line option: "-X cmd" @64 will execute "cmd" right
$   before normal operation starts.  The only option to execute commands
$   in non-interactive mode when reading of resource files has been
$   actively suppressed.  This is an experimental feature. [d202869]

ChangeLog (purely technical)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

. Improved output flushing, avoidance of printing of useless
  output (especially smoothens *editalong*). [topic/stdout-fflush]
. String relaxation is now everywhere (but IMAP), the builtin buffer
  sizes were reduced to 1/3.
. Again a manual review.  The manual now supports mdocmx(7).
. Using builtin ARC4 pseudo-random for random generation.
. Better signal handling here and there.
. Fixed most "unpluggable memory leaks" by plugging them via chains of
  signal handlers and longjmps.  Terrible.  But no more leaks.
. A lot of this and that.  (Really.)
$. Slightly more tolerance for faulty Base64 encoding in message text
$ parts.  No real healing possible today, but requires v15.0 environment.
$ This, however, only affects invalid data that, e.g., OpenSSL doesn't
$ even give any output for! [54137fd,4d59cca]

I didn't make it to improved message selection.
And i also can't seem to find the necessary peace of mind to do a real
review with this codebase, it's always that i start off doing something
non-reviewish; but i'll see the day (what i hope).

NEWS entries for the S-nail releases before v14.8.0 have been cut off
before release v14.8.5 and can be found in the git(1) repository:

  v14.8.0 - v14.8.12: $ git show v14.8.12:NEWS
  v13     - v14.8.5 : $ git show v14.8.5:NEWS
  9.0     - 12.5    : $ git show heirloom:ChangeLog

Also accessible via the following URL, just replace X.Y.Z accordingly:
  https://git.sdaoden.eu/cgit/s-nail.git/tree/NEWS?h=vX.Y.Y
For even older releases you need to look into the [timeline] branch, but
no changelog has been administrated for them.

# s-ts-mode