DIR <code>) are now handled correctly. The PROT (protocol) keyword never worked
correctly.
Some ambiguities (e.g. "PROT NOTIFY" and "PROT NOT IFY") are now handled more
gracefully. White-space is now required after AND/OR/EQUAL/NOT if the next char
is a letter. All the examples in http://synchro.net/docs/security.html
still work as documented.