(svn r1227) -Add: Ingame Server-list (select Internet, then Find Servers)

-Fix: UDPListener was launched wrongly
-Fix: Not all sockets have broadcast enabled anymore
-Fix: Server-advertise retries 3 times before giving up

network_udp.h

@@ -2,9 +2,10 @@
 #define NETWORK_LAN_H
 
 void NetworkUDPInitialize(void);
-bool NetworkUDPListen(uint32 host, uint16 port);
-void NetworkUDPReceive(void);
+bool NetworkUDPListen(SOCKET *udp, uint32 host, uint16 port, bool broadcast);
+void NetworkUDPReceive(SOCKET udp);
 void NetworkUDPSearchGame(void);
+void NetworkUDPQueryMasterServer(void);
 NetworkGameList *NetworkUDPQueryServer(const byte* host, unsigned short port);
 void NetworkUDPAdvertise(void);