Drop the default websocket close handler

wsapi.go

@@ -86,6 +86,10 @@ func (s *Session) Open() error {
 		return err
 	}
 	
+	s.wsConn.SetCloseHandler(func(code int, text string) error {
+		return nil
+	})
+
 	defer func() {
 		// because of this, all code below must set err to the error
 		// when exiting with an error :)  Maybe someone has a better