started to refactor startup code and to move udp server code out to its own class (currently not being used though) so that a single instance can handle multiple regions (each will need to be listening on a separate udp port)

OpenSim.RegionServer/OpenSimNetworkHandler.cs

@@ -8,8 +8,6 @@ namespace OpenSim
 {
     public interface OpenSimNetworkHandler
     {
-        //public abstract void StartUp();
-       // public abstract void Shutdown();
         void SendPacketTo(byte[] buffer, int size, SocketFlags flags, uint circuitcode);// EndPoint packetSender);
         void RemoveClientCircuit(uint circuitcode);
         void RegisterPacketServer(PacketServer server);