int flush_nattable()
flush_nattable()
int flush_nattable(){	nat_t *nat, **natp;	int i, j = 0;	for (natp = &nat_table[0][0], i = NAT_SIZE - 1; i >= 0; i--, natp++)		while ((nat = *natp)) {			*natp = nat->nat_next;			KFREE((caddr_t)nat);			j++;		}	for (natp = &nat_table[1][0], i = NAT_SIZE - 1; i >= 0; i--, natp++)		while ((nat = *natp)) {			*natp = nat->nat_next;			KFREE((caddr_t)nat);			j++;		}	return j;}