Returns the startup information.

def Run(self, unused_arg, ttl=None):
    """Returns the startup information."""
    logging.debug("Sending startup information.")
    boot_time = rdfvalue.RDFDatetime.FromSecondsSinceEpoch(psutil.boot_time())
    response = rdf_client.StartupInfo(
        boot_time=boot_time, client_info=GetClientInformation())

    self.grr_worker.SendReply(
        response,
        session_id=self.well_known_session_id,
        response_id=0,
        request_id=0,
        message_type=rdf_flows.GrrMessage.Type.MESSAGE,
        require_fastpoll=False,
        ttl=ttl)