Adds a config option to automatically delist the server from the BYOND up when there are no admins.

code/controllers/configuration.dm

@@ -219,6 +219,7 @@ var/list/gamemode_cache = list()
 	var/list/language_prefixes = list(",","#","-")//Default language prefixes
 
 	var/ghosts_can_possess_animals = 0
+	var/delist_when_no_admins = FALSE
 
 /datum/configuration/New()
 	var/list/L = typesof(/datum/game_mode) - /datum/game_mode
@@ -707,6 +708,9 @@ var/list/gamemode_cache = list()
 				if ("lobby_screens")
 					config.lobby_screens = text2list(value, ";")
 
+				if("delist_when_no_admins")
+					config.delist_when_no_admins = TRUE
+
 				else
 					log_misc("Unknown setting in configuration: '[name]'")