RCM_NEED_TO_UNREGISTER
client->prv_flags |= RCM_NEED_TO_UNREGISTER;
client->prv_flags &= ~RCM_NEED_TO_UNREGISTER;
if (client->prv_flags & RCM_NEED_TO_UNREGISTER) {
client->prv_flags &= ~RCM_NEED_TO_UNREGISTER;