Log Message:
nb1: Make more IRC protocol correct.

* Automatically issue the equivalent of a NAMES after a JOIN.

* Allow PART command so that client may lurk; reissue a JOIN to re-"open"
  the channel on the client if a new open message arrives.

* Provide a fake MOTD to make some IRC clients happier.

* 353 (NAMES response) should have a single space character at the end
  of each line per protocol (Gaim is strict about this).