(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

misc.c

@@ -99,6 +99,9 @@ void SetDate(uint date)
 	ConvertDayToYMD(&ymd, _date = date);
 	_cur_year = ymd.year;
 	_cur_month = ymd.month;
+#ifdef ENABLE_NETWORK
+	_network_last_advertise_date = 0;
+#endif /* ENABLE_NETWORK */
 }