Added Broadcast listening

Program.cs

@@ -78,7 +78,7 @@ namespace TYTD
                     Uri uri = new Uri(url0.Replace("+", "domain"));
                     port = (ushort)uri.Port;
                 }
-                UdpClient cl;
+                //UdpClient cl;
                
                 Thread t3 = new Thread(() => {
                     IPEndPoint end = new IPEndPoint(0, 0);