Revert "After speaking with Ben Gray and the discussion on the mailing list, this is an attempt to create a sockopt to allow connecting pipes to not immediately be available for traffic. The problem is in a PUSH to many PULL situation, where there is a connect to a PULL which is not there. This connect will immediately create a pipe (unlike bind), and traffic will be load balanced to that pipe. This means if there is a persistently unavailable end point then the traffic will queue until HWM is hit, and older messages will be lost."

This reverts commit fe3fb419fe.

src/session_base.hpp

@@ -52,9 +52,6 @@ namespace zmq
 
         //  To be used once only, when creating the session.
         void attach_pipe (zmq::pipe_t *pipe_);
-        
-        // To be used once only, for delayed connection
-        void onconnect_attach_pipe (pipe_t *pipe_);
 
         //  Following functions are the interface exposed towards the engine.
         virtual int read (msg_t *msg_);
@@ -107,9 +104,6 @@ namespace zmq
         //  Pipe connecting the session to its socket.
         zmq::pipe_t *pipe;
 
-        //  Pipe connecting the socket to the client
-        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;