Revert "Removing unnecessary outpipe values that had been used for reconnecting existing pipes - no longer needed when using a pipe term for the delay_attach situation."

This reverts commit ace7c99b91.

src/session_base.cpp

@@ -306,9 +306,15 @@ void zmq::session_base_t::process_attach (i_engine *engine_)
         zmq_assert (!pipe);
         pipe = pipes [0];
 
+        //  Remember the remote end of the pipe if required
+        if (options.delay_attach_on_connect == 1)
+            outpipe = pipes [1];
+
         //  Ask socket to plug into the pipe.
         send_bind (socket, pipes [1]);
     }
+    else if (outpipe && (options.delay_attach_on_connect == 1)) 
+        send_bind (socket, outpipe);
 
     //  Plug in the engine.
     zmq_assert (!engine);

src/session_base.hpp

@@ -104,6 +104,9 @@ namespace zmq
         //  Pipe connecting the session to its socket.
         zmq::pipe_t *pipe;
 
+        //  Socket end of pipe, in case of reconnection
+        zmq::pipe_t *outpipe; 
+
         //  This flag is true if the remainder of the message being processed
         //  is still in the in pipe.
         bool incomplete_in;