gpg: Add regular expression support.

* AUTHORS, COPYING.other: Update.
* Makefile.am (SUBDIRS): Add regexp sub directory.
* configure.ac (DISABLE_REGEX): Remove.
* g10/Makefile.am (needed_libs): Add libregexp.a.
* g10/trustdb.c: Remove DISABLE_REGEX support.
* regexp/LICENSE, regexp/jimregexp.c, regexp/jimregexp.h,
  regexp/utf8.c, regexp/utf8.h: New from Jim Tcl.
* regexp/UnicodeData.txt: New from Unicode.
* regexp/Makefile.am, regexp/parse-unidata.awk: New.
* tests/openpgp/Makefile.am: Remove DISABLE_REGEX support.
* tools/Makefile.am: Remove DISABLE_REGEX support.

GnuPG-bug-id: 4843
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>

tests/openpgp/Makefile.am

@@ -276,11 +276,7 @@ CLEANFILES = prepared.stamp x y yy z out err  $(data_files) \
 	     gnupg-test.stop random_seed gpg-agent.log tofu.db \
 	     passphrases sshcontrol S.gpg-agent.ssh report.xml
 
-if DISABLE_REGEX
-EXTRA_DIST += trust-pgp-4.scm
-else
 XTESTS += trust-pgp-4.scm
-endif
 
 clean-local:
 	-rm -rf private-keys-v1.d openpgp-revocs.d tofu.d gpgtar.d