Allow customizing the staff relay host (#70)

* Update settingtypes.txt

* Update init.lua

Author: LoneWolfHT

server_chat/init.lua

@@ -214,10 +214,11 @@ end
 -- Staff Channel
 
 local ongoing = nil
+local host = core.settings:get("server_chat_discord_relay_host") or "127.0.0.1"
 local function grab_staff_messages()
 	if not ongoing then
 		ongoing = http.fetch_async({
-			url = "localhost:31337",
+			url = host .. ":31337",
 			timeout = 10,
 			method = "GET",
 		})

server_chat/settingtypes.txt

@@ -1,2 +1,3 @@
 server_chat_webhook (Webhook to send staff messages to) string ""
 server_chat_relay_from_discord (Accept !st messages sent from ctf-discord-bot) bool false
+server_chat_discord_relay_host (Host that ctf-discord-bot is at) string "127.0.0.1"