ws: release TCP connection if not static

This should fix a memory leak (reported in #743 by Eric Tamme)

(cherry picked from commit 29190f3)

modules/proto_ws/ws_handshake.c

@@ -148,8 +148,9 @@ int ws_handshake(struct tcp_connection *con)
 			goto error;
 		}
 
-		init_tcp_req(req, 0);
 		con->msg_attempts = 0;
+		if (req != &_ws_common_tcp_current_req)
+			pkg_free(req);
 
 		/* handshake now completed, destroy the handshake data */
 		WS_SET_STATE(con, WS_CON_HANDSHAKE_DONE);