plugins/muc/mod_muc: Remove attempt_room_creation and create_room function. Instead have a 'track_room' function called from the end of the pre-create hook, and just create an un-tracked room object when we get a presence

local cache = module:shared("/*/sql.lib/util.sql");

if not cache._M then
	prosody.unlock_globals();
	cache._M = require "util.sql";
	prosody.lock_globals();
end

return cache._M;