rem: *nfcache |= NFC_UNKNOWN;
context: init(struct ipt_entry_target *t, unsigned int *nfcache){	struct ipt_reject_info *reject = (struct ipt_reject_info *)t->data;	/* default */	reject->with = IPT_ICMP_PORT_UNREACHABLE;	/* Can't cache this */	*nfcache |= NFC_UNKNOWN;}