Fold the two patches for bu6 69 together, building on the bug 65 patch

src/internet-node/udp-socket.h

@@ -62,6 +62,7 @@ private:
   int FinishBind (void);
   void ForwardUp (const Packet &p, Ipv4Address ipv4, uint16_t port);
   void Destroy (void);
+  int DoSend (const Packet &p);
   int DoSendTo (const Packet &p, const Address &daddr);
   int DoSendTo (const Packet &p, Ipv4Address daddr, uint16_t dport);