Update world server to be accessible from LAN

See issue #1

prof-distributed/tennis/Assets/scripts/Server.cs

@@ -40,12 +40,21 @@ public class Server : MonoBehaviour {
     disconnectIndex = new List<int>();
 
     try {
-      server = new TcpListener(IPAddress.Any, Port);
+      IPHostEntry hostEntry = Dns.GetHostEntry(Dns.GetHostName());
+      IPAddress localAddress = IPAddress.Any;
+      foreach(IPAddress ip in hostEntry.AddressList){
+        if(ip.AddressFamily==System.Net.Sockets.AddressFamily.InterNetwork){
+          localAddress = ip;
+          break;
+        }
+      }
+      server = new TcpListener(localAddress, Port);
       server.Start();
 
       Startlistening();
       serverStarted = true;
       Debug.Log("Server has started on port:" + Port.ToString());
+      Debug.Log("Server has started on IP:" + localAddress.ToString());
     }
     catch (Exception e) {
       Debug.Log("Socket Error " + e.Message);
@@ -274,4 +283,4 @@ public class ServerClient {
     tcp = clientSocket;
     ClientObj = new List<GameObject>();
   }
-}
+}