mod_ircd: Fixed nick change logic (thanks mva), so that the self nick-change "flag" is removed properly, improved the logic to use verse's room_mt:change_nick (thanks Zash) yet to be pushed into main, added squished verse with the meta method included.

module:hook("authentication-failure", function (event)
	module:log("info", "Failed authentication attempt (%s) from IP: %s", event.condition, event.session.ip);
end);