Update for new exclude module from gnulib. Add testcases by Phil Proudman.

* src/names.c (is_pattern): Remove.
(regex_usage_warning): Use fnmatch_pattern_has_wildcards instead of
is_pattern.
* src/tar.c: New option --exclude-backups.
(vcs_file_table, backup_file_table): New globals.
(add_exclude_array): New function.
* tests/exclude01.at, tests/exclude02.at,
tests/exclude03.at, tests/exclude04.at,
tests/exclude05.at: New testcases. Supplied by Phil Proudman.
* tests/Makefile.am (TESTSUITE_AT): Add new tests.
* tests/testsuite.at: Add new tests.
* THANKS: Update.

tests/exclude03.at

@@ -0,0 +1,73 @@
+# Process this file with autom4te to create testsuite. -*- Autotest -*-
+# Copyright (C) 2009 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([exclude: wildcards match slash])
+AT_KEYWORDS([exclude exclude03])
+
+AT_TAR_CHECK([
+AT_SORT_PREREQ
+
+rm -rf testdir
+mkdir -p testdir/dir1 testdir/dir2 testdir/dir3
+touch testdir/\*f\*1
+touch testdir/dir1/file1
+touch testdir/dir1/\*
+touch testdir/dir2/file2
+touch testdir/dir2/\*
+touch testdir/dir3/file3
+touch testdir/dir3/\*
+
+tar cf archive --exclude='testdir*f*1' \
+               --no-wildcards-match-slash \
+               --exclude='testdir*f*2' \
+               --wildcards-match-slash \
+               --exclude='testdir*f*3' \
+               testdir
+tar tf archive | sort
+
+echo "NEXT"
+tar cf archive testdir
+tar t --wildcards 'testdir/*f*1' -f archive | sort
+
+echo "NEXT"
+tar t --wildcards --no-wildcards-match-slash 'testdir/*f*1' -f archive | sort
+
+echo "NEXT"
+tar t --wildcards --wildcards-match-slash 'testdir/*f*1' -f archive | sort
+
+rm -rf testdir
+
+],
+[0],
+[testdir/
+testdir/dir1/
+testdir/dir1/*
+testdir/dir2/
+testdir/dir2/*
+testdir/dir2/file2
+testdir/dir3/
+testdir/dir3/*
+NEXT
+testdir/*f*1
+testdir/dir1/file1
+NEXT
+testdir/*f*1
+NEXT
+testdir/*f*1
+testdir/dir1/file1
+])
+
+AT_CLEANUP