send arena in match permit check

ygopro-server.coffee

@@ -1897,7 +1897,8 @@ ygopro.ctos_follow 'JOIN_GAME', false, (buffer, info, client, server, datas)->
         json: true,
         qs:
           username: client.name,
-          password: info.pass
+          password: info.pass,
+          arena: settings.modules.arena_mode.mode
       , (error, response, body)->
         if client.closed
           return

ygopro-server.js

@@ -2359,7 +2359,8 @@
           json: true,
           qs: {
             username: client.name,
-            password: info.pass
+            password: info.pass,
+            arena: settings.modules.arena_mode.mode
           }
         }, function(error, response, body) {
           if (client.closed) {