cally display notices differently from privmsgs.

        @type sender: C{str} or C{unicode}
        @param sender: Who is sending this message.  Should be of the form
            username!ident@hostmask (unless you know better!).

        @type recip: C{str} or C{unicode}
        @param recip: The recipient of this message.  If a channel, it must
            start with a channel prefix.

        @type message: C{str} or C{unicode}
        @param message: The message being sent.
        Z