fix UDP ASSOCIATE SOCKS5 connection retry

src/session_impl.cpp

@@ -1837,7 +1837,7 @@ namespace {
 		if (m_settings.get_int(settings_pack::proxy_type) != settings_pack::none)
 		{
 			// we will be able to accept incoming connections over UDP. so use
-			// one of the ports the user specified to use a constistent port
+			// one of the ports the user specified to use a consistent port
 			// across sessions. If the user did not specify any ports, pick one
 			// at random
 			int const port = m_listen_interfaces.empty()

src/udp_socket.cpp

@@ -922,6 +922,8 @@ void socks5::hung_up(error_code const& e)
 void socks5::retry_socks_connect(error_code const& e)
 {
 	if (e) return;
+	error_code ignore;
+	m_socks5_sock.close(ignore);
 	start(m_proxy_settings);
 }