Merge pull request #3166 from Citadel-Station-13/upstream-merge-31315

[MIRROR] Removes shitty sleep from area/Entered

code/game/area/areas.dm

@@ -449,10 +449,11 @@ GLOBAL_LIST_EMPTY(teleportlocs)
 
 		if(!L.client.played)
 			SEND_SOUND(L, sound(sound, repeat = 0, wait = 0, volume = 25, channel = CHANNEL_AMBIENCE))
-			L.client.played = 1
-			sleep(600)			//ewww - this is very very bad
-			if(L.&& L.client)
-				L.client.played = 0
+			L.client.played = TRUE
+			addtimer(CALLBACK(L.client, /client/proc/ResetAmbiencePlayed), 600) 
+
+/client/proc/ResetAmbiencePlayed()
+	played = FALSE
 
 /atom/proc/has_gravity(turf/T)
 	if(!T || !isturf(T))