void fr_stateunload()
fr_stateunload()
void fr_stateunload(){	register int i;	register ipstate_t *is, **isp;	MUTEX_ENTER(&ipf_state);	for (i = 0; i < IPSTATE_SIZE; i++)		for (isp = &ips_table[i]; (is = *isp); ) {			*isp = is->is_next;			KFREE(is);		}	MUTEX_EXIT(&ipf_state);}