Author: Kev <klmitch@mit.edu>

Author: Kev <klmitch@mit.edu>
Log Message:

Support for extension queries.  Think of it like PRIVMSG and NOTICE for
servers; this allows pseudoservers to send each other messages.
Additionally, iauth can send messages to and receive messages from
pseudoservers.  This mechanism is introduced to make login-on-connect
easier to code, by providing an in-band mechanism for iauth to connect
the login server.

NOTE:  THIS PATCH HAS NOT YET BEEN COMPILED OR TESTED.  Sorry, but I
just got back from vacation, and will be flying out again tomorrow.  I
figured I could commit now and get others to help me test :)

git-svn-id: file:///home/klmitch/undernet-ircu/undernet-ircu-svn/ircu2/branches/u2_10_12_branch@1925 c9e4aea6-c8fd-4c43-8297-357d70d61c8c