added some cleanup code

code/controllers/subsystem/persistence.dm

@@ -266,6 +266,10 @@ SUBSYSTEM_DEF(persistence)
 	var/bunker_path = file("data/bunker_passthrough.json")
 	if(fexists(bunker_path))
 		GLOB.bunker_passthrough = json_decode(file2text(bunker_path))
+		var/round_id = GLOB.round_id
+		for(var/ckey in GLOB.bunker_passthrough)
+			if(round_id - GLOB.bunker_passthrough[ckey] > 30)
+				GLOB.bunker_passthrough -= ckey
 
 /datum/controller/subsystem/persistence/proc/GetPhotoAlbums()
 	var/album_path = file("data/photo_albums.json")

code/modules/admin/chat_commands.dm

@@ -137,6 +137,7 @@ GLOBAL_LIST(round_end_notifiees)
 		return "The Database is not enabled!"
 
 	GLOB.bunker_passthrough |= ckey(params)
+	GLOB.bunker_passthrough[ckey(params)] = GLOB.round_id
 	SSpersistence.SavePanicBunker() //we can do this every time, it's okay
 	log_admin("[sender.friendly_name] has added [params] to the current round's bunker bypass list.")
 	message_admins("[sender.friendly_name] has added [params] to the current round's bunker bypass list.")

code/modules/admin/verbs/panicbunker.dm

@@ -24,7 +24,8 @@
 		return
 
 	GLOB.bunker_passthrough |= ckey(ckeytobypass)
-	SSpersistence.SavePanicBunker()
+	GLOB.bunker_passthrough[ckey(ckeytobypass)] = GLOB.round_id
+	SSpersistence.SavePanicBunker() //we can do this every time, it's okay
 	log_admin("[key_name(usr)] has added [ckeytobypass] to the current round's bunker bypass list.")
 	message_admins("[key_name_admin(usr)] has added [ckeytobypass] to the current round's bunker bypass list.")
 	send2irc("Panic Bunker", "[key_name(usr)] has added [ckeytobypass] to the current round's bunker bypass list.")