i think it works

MAJOR antag backend update
- you cannot bruteforce the pen anymore
- uplink now uses bitflag to lock purchases
- poplock is handled entirely by the buyable uplink items
- tgui antag intro (for selected ones)

code/datums/datum.dm

@@ -106,7 +106,7 @@
 	active_timers = null
 	for(var/thing in timers)
 		var/datum/timedevent/timer = thing
-		if (timer.spent)
+		if (timer.spent && !(timer.flags & TIMER_DELETE_ME))
 			continue
 		qdel(timer)