Feature: allow the use of STUN to connect client and server together

This method doesn't require port-forwarding to be used, and works for
most common NAT routers in home setups. But, for sure it doesn't work
for all setups, and not everyone will be able to use this.

src/network/core/address.h

@@ -175,6 +175,8 @@ public:
 
 	static const char *SocketTypeAsString(int socktype);
 	static const char *AddressFamilyAsString(int family);
+	static NetworkAddress GetPeerAddress(SOCKET sock);
+	static NetworkAddress GetSockAddress(SOCKET sock);
 	static const std::string GetPeerName(SOCKET sock);
 };