Remove more GPL dependencies.

@@ -2,11 +2,17 @@
 
 	GNU md5 is GPL, but we agreed that the libraries should
 	fall under LGPL.
+	Same goes for basename() and pretty much everything under
+	lib/*.[ch]
 
 	* mailbox/message.c (message_get_uidl): Remove the dependency
 	from GNU md5.
 	* mailbox/md5-rsa.c: New File.
 	* mailbox/md5-rsa.h: New File.
+	* mailbox/attachment.c (message_create_attachment): Remove
+	the dependency from lib/basename.c
+	* mailbox/mbx_mbox.c (mbox_tempfile): Remove
+	the dependency from lib/basename.c
 
 	* lib/signame.c: Replace in favor of the wellknown strsignal().
 	* lib/strsignal.c: New file, use the mu_signame() written by

@@ -47,7 +47,6 @@
 
 /* FIXME: this should be in a public header.  */
 extern int message_attachment_filename __P ((message_t, const char **filename));
-extern char *base_name __P ((char const *));
 
 struct _msg_info {
 	char	*buf;
@@ -82,7 +81,11 @@ int message_create_attachment(const char *content_type, const char *encoding, co
 		if ( encoding == NULL )
 			encoding = "7bit";
 		if ( ( fname = strdup(filename) ) != NULL ) {
-			name = base_name(fname);
+			name = strrchr (fname, '/');
+			if (name)
+			  name++;
+			else
+			  name = fname;
 			if ( ( header = alloca(strlen(MSG_HDR) + strlen(content_type) + strlen(name) * 2 + strlen(encoding) + 1) ) == NULL )
 				ret = ENOMEM;
 			else {
@@ -109,7 +112,7 @@ int message_create_attachment(const char *content_type, const char *encoding, co
 		if ( fstream )
 			stream_destroy(&fstream, NULL);
 		if ( fname )
-			free(fname);
+		  free(fname);
 	}
 	return ret;
 }

@@ -161,8 +161,6 @@ struct _mbox_data
   mailbox_t mailbox; /* Back pointer. */
 };
 
-extern char *base_name __P ((char const *));
-
 /* Mailbox concrete implementation.  */
 static int mbox_open                  __P ((mailbox_t, int));
 static int mbox_close                 __P ((mailbox_t));
@@ -504,7 +502,11 @@ mbox_tmpfile (mailbox_t mailbox, char **pbox)
 #  define P_tmpdir "/tmp"
 #endif
 
-  basename = base_name (mud->name);
+  basename = strrchr (mud->name, '/');
+  if (basename)
+    basename++;
+  else
+    basename = mud->name;
 
   tmpdir =  getenv ("TMPDIR") ? getenv ("TMPDIR") : P_tmpdir;
   /* (separator + null) == 2 + XXXXXX == 6 + ... */