code: def stage_http_response1(self, conn_id, version, status, reason, headers):
          
          # pylint: disable=attribute-defined-outside-init
          self._http_response_version = version
          self._http_response_status = status
          self._http_response_reason = reason
          self._http_response_headers = headers
docs: Set response http info including headers, status, etc.
             conn_id unused here. Used in log