'Indicate that the DroneManager should look for the given pidfile when
refreshing.'

def register_pidfile(self, pidfile_id):

    if (pidfile_id not in self._registered_pidfile_info):
        logging.info('monitoring    pidfile    %s', pidfile_id)
        self._registered_pidfile_info[pidfile_id] = _PidfileInfo()
    self._reset_pidfile_age(pidfile_id)
