Rework to use more-modern build style.

Rework to use more-modern build style.
Many files are renamed; all uses of their names were changed.
* .x-sc_trailing_blank: Renamed from .x-sc_trailing_blank.
* .x-sc_useless_cpp_parens: New file.
* build-aux/config.guess: Renamed from config/config.guess.  Update.
* build-aux/config.sub: Renamed from config/config.sub.  Update.
* build-aux/elisp-comp: Renamed from config/elisp-comp.
* build-aux/install-sh: Renamed from config/install-sh.  Update.
* build-aux/mdate-sh: Renamed from config/mdate-sh.
* build-aux/missing: Renamed from config/missing.
* build-aux/texinfo.tex: Renamed from config/texinfo.tex.  Update.
* build-aux/vc-list-files: Renamed from config/vc-list-files.
* config/Makefile.am: Removed.
* config/mkinstalldirs: Removed.
* config/move-if-change: Removed.
* m4/m4.m4: Renamed from config/m4.m4.  Add (C) to copyright notice.
* Makefile.am (SUBDIRS): Remove config.
(ACLOCAL_AMFLAGS): Include from m4, not config.
(EXTRA_DIST): Add config/announce-gen, config/prev-version.txt.
(WGET, WGETFLAGS): New macros, since Makefile.maint no longer does this.
(autom4te-update): Rewrite with a loop.  Get from gnulib, not automake.
Fail if there's an error.
* Makefile.cfg (move_if_change): Remove.
(wget_files): Remove.
(cvs_executable_files): New macro.
(cvs_files): Use it.  Remove mkinstalldirs.  Add fdl.texi.
(executable-update): Use $(cvs_executable_files).
(local-checks-to-skip): Remove.
* Makefile.maint: Merge from coreutils, plus add our own changes
(gzip_rsyncable): New macro.
(GZIP_ENV): Use it.
(CVS_LIST): Use build-aux/vc-list-files.
(VERSION_REGEXP): New macro.
(local-checks-available): Add patch-check, $(syntax-check-rules),
check-AUTHORS.
(syntax-check-rules): Compute dynamically.
(sc_cast_of_x_alloc_return_value): Work even if no source files.
(sc_cast_of_alloca_return_value): Likewise.
(sc_prohibit_atoi_atof): Simplify regexp.
(sc_no_if_have_config_h, sc_require_config_h):
(sc_prohibit_assert_without_use,
(sc_obsolete_symbols): Check for O_NDELAY.
(sc_texi_notab): Remove.
(sc-changelog): Don't make an exception for '----' lines.
(.re-list): Remove, so we don't have a junk file behind.
(sc_system_h_headers): Remove the need for .re-list.
(sc_the_the):  New rule.
(sc_tight_scope): Simplify.
(sc_trailing_space): Renamed from sc_trailing_blank.
(longopt_re): New macro.
(sc_two_space_separator_in_usage): New rule.
(sc_unmarked_diagnostics): Look at all files under CVS.
(sc_useless_cpp_parens, patch-check, check-AUTHORS): New rules.
(news-date-check, changelog-check): Version is OK.
(po-check): Look for lib files even if not in CVS.
(copyright-check): Use $() not ``.
(maintainer-distcheck): Do not depend on changelog-check.
(my-distcheck): Depend on $(release_archive_dir)/$(prev-tgz).
Also check for -Wpointer-arith.
(WGET, WGETFLAGS, tgz-md5, tgz-sha1, bz2-md5, bz2-sha1):
(xdelta-md5, xdelta-sha1, tgz-size, bz2-size, xd-size, rel-check):
Remove.
(announcement): Add --gpg-key-id arg.
(cvs-sv): Remove.
(move_if_change): Just use mv.
(local_updates: Remove wget-update, po-update.
(po_repo, do-po-update, po-update, wget_files, get-targets): Remove.
(config.guess-url_prefix, config.sub-url_prefix): Remove.
(ansi2knr.c-url_prefix, texinfo.tex-url_prefix):
(standards.texi-url_prefix, make-stds.texi-url_prefix, target, url):
($(get-targets)): Remove.
(cvs_files): Remove missing, mkinstalldirs, ansi2knr.c.
(gnulib_repo): Renamed from automake_repo.  Get from gnulib now.
(cvs-update): Get from gnulib.
(emut_upload_commands): gnupload is in build-aux now.
(alpha beta major): Add changelog-check.  Check version.
* configure.ac (AC_CONFIG_AUX_DIR): Renamed from config to build-aux.
(AC_CONFIG_FILES): Remove.
* bin/autoconf.as: Add spaces to avoid distcheck warning.
* config/announce-gen: Sync from coreutils.
* doc/make-stds.texi: Sync from gnulib.
* doc/standards.texi: Likewise.
* man/Makefile.am: Adjust for config -> build-aux renaming.
* tests/Makefile.am: Prefer $(FOO) to @FOO@.
* tests/local.at: Adjust from config -> build-aux renaming.
* tests/tools.at: Likewise.
* tests/torture.at: Likewise.