mod_muc_batched_probe: don't rely on mt_room:respond_to_probe method That method assumes it's responding to a `<presence>` stanza, which breaks for the bached probe use-case.

module:set_global();

local log = _G.log;

module:add_timer(60-os.date("%S"), function (now)
	log("info", "-- MARK --");
	return 90 - ((now + 30) % 60);
end);