allow tcp request with no dest, auto query topic.

lichao

2021-06-04 903b27f875e5f2a872c1b309f354b18c0450f35a

 utest/robust_test.cpp

@@ -75,7 +75,7 @@
   int64_t d;
   BOOST_CHECK(tmp.pop(d));

   ShmObject<Rcb> rcb(shm, "test_rcb", eOpenOrCreate);
   NamedShmObject<Rcb> rcb(shm, "test_rcb", eOpenOrCreate);
   bool try_more = true;

   auto Writer = [&]() {