Send HELLO instead of NOP for NAT-t in order to measure latency always. Also prevents a race that can cause the first NAT-t to fail where the NOP arrives before the WHOIS reply from the supernode. Now NAT-t initiators will push their own public keys anyway so that doesnt matter.

node/Switch.hpp

@@ -106,6 +106,16 @@ public:
 	 */
 	void sendHELLO(const Address &dest);
 
+	/**
+	 * Send a HELLO announcement immediately to the indicated address
+	 *
+	 * @param localPort Originating local port or ANY_PORT to pick
+	 * @param addr IP address to send to
+	 * @param dest Destination peer
+	 * @return True if send appears successful
+	 */
+	bool sendHELLO(const SharedPtr<Peer> &dest,Demarc::Port localPort,const InetAddress &addr);
+
 	/**
 	 * Send RENDEZVOUS to two peers to permit them to directly connect
 	 *