* Server-to-server topic checking would always fail (oops.)

* SUMMON, USERS, MOTD, PING, PONG, and LINKS now all accept a servername as a
  valid argument for fetching the related command from the target server.
* SUMMON doesn't support passing of a string. (May be reintroduced later)
* LINKS now filters by mask if one is provided as per RFC1459.
* WHOIS now accepts a valid server as its second argument for message passing.
* CONNECT target.* <port> remote.* now works as per RFC1459.
* Sigh, more 'var' cleanup...