engine termination on disconnect fixed

src/connect_session.hpp

@@ -39,11 +39,11 @@ namespace zmq
             const char *protocol_, const char *address_);
         ~connect_session_t ();
 
-        //  i_inout interface implementation.
-        void detach ();
-
     private:
 
+        //  Hook into session's disconnection mechanism.
+        void detached ();
+
         //  Start the connection process.
         void start_connecting ();