9.28: message object can now be used for other IRC-like protocols such as JELP and TS6.
            each implementation will provide its own parameter modifier subroutines and a function to look up message sources.
            finally removed the hideous parameter parser from JELP::Base.
            it has been replaced by the functionality provided by the message object.
            all JELP command handlers have been updated accordingly.
            as a result, the 'high.level.handlers' callback was finally removed also.
            server method ->handle() is no longer used as of right now.
            server command forwarding is now executed by a separate, lower-priority event callback.
            registered servers now have events message_$CMD and $PROTO_message_$CMD.