add readme.

lichao

2021-06-07 2c73aac1fe62495d8c863a92a34d191cf8e87fc0

 utest/tcp_test.cpp

@@ -49,11 +49,12 @@
      auto route = head.add_route();
      route->set_mq_id(12345);
      route->set_abs_addr(67890);
      head.set_topic(req.topic());

      head.mutable_dest()->set_ip(connect_addr);
      head.mutable_dest()->set_port(port);
      head.mutable_dest()->set_mq_id(201);
      head.mutable_dest()->set_abs_addr(10072);
      // head.mutable_dest()->set_port(port);
      // head.mutable_dest()->set_mq_id(201);
      // head.mutable_dest()->set_abs_addr(10072);

      return (MsgI::Serialize(head, req));
   };