+ * Revision 1.6 2003/09/15 02:48:54 mdw
+ * Monoalphabetic match filter.
+ *
+ * Revision 1.5 2002/08/11 12:58:09 mdw
+ * Added support for regular expression matching, if supported by the C
+ * library.
+ *
+ * Revision 1.4 2001/02/19 19:18:50 mdw
+ * Minor big fixes to parser.
+ *
+ * Revision 1.3 2001/02/16 21:45:19 mdw
+ * Be more helpful. Improve full help message. Special-case error for
+ * empty command strings.
+ *