Fixed typo in doc example

doc/zmq_tcp.txt

@@ -69,7 +69,7 @@ EXAMPLES
 .Assigning a local address to a socket
 ----
 //  TCP port 5555 on all available interfaces
-rc = zmq_bind(socket, "tcp:/// :5555");
+rc = zmq_bind(socket, "tcp://*:5555");
 assert (rc == 0);
 //  TCP port 5555 on the local loop-back interface on all platforms
 rc = zmq_bind(socket, "tcp://127.0.0.1:5555");