SSinstancing (I need to test this with 2 machines)

code/modules/world_topic/server_discovery.dm

@@ -0,0 +1,12 @@
+/datum/world_topic_handler/server_discovery
+	topic_key = "server_discovery"
+	requires_commskey = TRUE
+
+/datum/world_topic_handler/server_discovery/execute(list/input, key_valid)
+	// We need to send the stuff to make a /datum/peer_server on the other side
+	var/list/server_data = list()
+	server_data["external_ip"] = world.internet_address
+	server_data["server_id"] = GLOB.configuration.instancing.server_id
+	server_data["server_name"] = GLOB.configuration.general.server_name
+	server_data["playercount"] = length(GLOB.clients)
+	return json_encode(server_data)