Added to the repository

+Makefile
+Makefile.in

+## Process this file with GNU Automake to create Makefile.in
+
+##   Copyright (C) 2001, 2002 Free Software Foundation, Inc.
+##
+##   GNU Mailutils 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 2, 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, write to the Free Software
+##   Foundation, Inc.
+##   59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+noinst_HEADERS = regex.h

+/* GNU Mailutils -- a suite of utilities for electronic mail
+   Copyright (C) 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   This library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA  */
+
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <errno.h>
+#include <stdlib.h>
+
+#include <mailutils/error.h>
+#include <mailutils/errno.h>
+
+#include <regex.h>
+
+static regex_t *re_prefix;
+
+int
+munre_set_regex (char *str, int caseflag, char **errp)
+{
+  int rc;
+  int flags = REG_EXTENDED;
+
+  if (errp)
+    *errp = NULL;
+
+  if (!str)
+    str = "^re: *";
+  if (re_prefix)
+    regfree (re_prefix);
+  else
+    {
+      re_prefix = malloc (sizeof (*re_prefix));
+      if (!re_prefix)
+	return ENOMEM;
+    }
+  if (!caseflag)
+    flags |= REG_ICASE;
+  rc = regcomp (re_prefix, str, flags);
+  if (rc)
+    {
+      if (errp)
+	{
+	  size_t s = regerror (rc, re_prefix, NULL, 0);
+	  s++;
+	  *errp = malloc (s);
+	  if (*errp)
+	    regerror (rc, re_prefix, *errp, s);
+	}
+      regfree (re_prefix);
+      free (re_prefix);
+      return MU_ERR_FAILURE;
+    }
+  return 0;
+}
+
+int
+munre_subject (const char *subject, const char **new_subject)
+{
+  int rc;
+  regmatch_t rm;
+
+  if (!subject)
+    return EINVAL;
+  
+  if (!re_prefix)
+    {
+      rc = munre_set_regex (NULL, 0, NULL);
+      if (rc)
+	return rc;
+    }
+
+  rc = regexec (re_prefix, subject, 1, &rm, 0);
+  if (rc == 0 && rm.rm_eo != -1 && new_subject)
+    *new_subject = subject + rm.rm_eo;
+  return rc;
+}