Merge branch 'topic/nyd'

Merge branch 'topic/nyd'

* topic/nyd:
  NYD: tty.c
  NYD: thread.c
  NYD: strings.c
  NYD: ssl.c
  NYD: spam.c
  NYD: smtp.c
  NYD: sendout.c..
  NYD: send.c
  NYD: quit.c
  NYD: popen.c
  NYD: pop3.c
  NYD: openssl.c; change S/MIME ciphers (RFC 5751)..
  NYD: names.c
  NYD: mime_cte.c
  NYD: mime.c
  NYD: unite md5* into rfc1321.h; hmac_md5() -> auxlily.c
  NYD: fix some stylos in main.c
  NYD: maildir.c
  NYD: list.c
  NYD: lex.c
  NYD: imap_search.c
  NYD: "("imap_cache.c")"
  NYD: (imap_gssapi.h)
  NYD: (imap.c)
  NYD: head.c
  NYD: fio.c
  NYD: filter.c
  NYD: edit.c
  NYD: dotlock.c
  NYD: collect.c
  NYD: cmd3.c
  NYD: cmd2.c
  NYD: cmd1.c
  NYD: attachments.c
  NYD: acmava.c
  Finally: add N(ot)Y(et)D(ead) support!
  nail.h: add __FUN__ macro