Removes spawn() from things I

- Removes from Sin of Greed slot machine (also cleans up the visible
message to make a difference between viewer and user)
- Removes from ferry request cooldown
- Removes from knock opening doors and closets

code/modules/spells/spell_types/knock.dm

@@ -16,13 +16,16 @@
 	user << sound("sound/magic/Knock.ogg")
 	for(var/turf/T in targets)
 		for(var/obj/machinery/door/door in T.contents)
-			spawn(1)
-				if(istype(door,/obj/machinery/door/airlock))
-					door:locked = 0
-				door.open()
+			addtimer(src, "open_door", 1, FALSE, door)
 		for(var/obj/structure/closet/C in T.contents)
-			spawn(1)
-				C.locked = 0
-				C.open()
+			addtimer(src, "open_closet", 1, FALSE, C)
 
-	return
+/obj/effect/proc_holder/spell/aoe_turf/knock/proc/open_door(var/obj/machinery/door/door)
+	if(istype(door, /obj/machinery/door/airlock))
+		var/obj/machinery/door/airlock/A = door
+		A.locked = FALSE
+	door.open()
+
+/obj/effect/proc_holder/spell/aoe_turf/knock/proc/open_closet(var/obj/structure/closet/C)
+	C.locked = FALSE
+	C.open()