* Fixed truncation of the reason when receiving a KILL message.
	The KILL handler thought the message started one word later than it did, and
	would cut off the first word.  This change starts the reason in the correct
	place, and shaves off a leading : if one is present.
* Minor change to behavior of automatic placement of notices.
        Previously, a notice received from a user to your nickname would hunt through
        the list of channels you were in attempting to find one common between you
        and the noticer.  This is especially annoying on freenode; since chanserv inhabits
        so many channels and notices from chanserv will be sucked into a random channel
        that you co-inhabit.

        The behavior of received notices is now as follows for "automatic" mode:
        1. the chanserv special case
        2. if you have a query open with the sender, put it there
        3. otherwise put it in the front session (or the server tab for snotices)

* Properly support notices to prefix'd users on a channel
	Instead of hardcoding this behavior for @, +, and %, fetch the list of
	mode prefixes from the server's state and look for one of those instead.

	If the list of mode prefixes isn't available, use those three as a default.