Drop outbound messages in XREP socket when SNDHWM is reached

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

src/rep.cpp

@@ -73,11 +73,8 @@ int zmq::rep_t::xrecv (msg_t *msg_, int flags_)
                 return rc;
             if (!(msg_->flags () & msg_t::label))
                 break;
-
-            //  TODO: If the reply cannot be sent to the peer because
-            //  od congestion, we should drop it.
             rc = xrep_t::xsend (msg_, flags_);
-            zmq_assert (rc == 0);
+            errno_assert (rc == 0);
         }
         request_begins = false;
     }

src/xrep.cpp

@@ -145,10 +145,6 @@ int zmq::xrep_t::xsend (msg_t *msg_, int flags_)
                     it->second.active = false;
                     more_out = false;
                     current_out = NULL;
-                    rc = empty.close ();
-                    errno_assert (rc == 0);
-                    errno = EAGAIN;
-                    return -1;
                 }
                 rc = empty.close ();
                 errno_assert (rc == 0);