NOT_INADDR
if (NOT_INADDR(host) == 0) {
} else if (NOT_INADDR(pat)) { /* internet name */
if (NOT_INADDR(server) == 0 || HOSTNAME_KNOWN(server)) {
if (NOT_INADDR(client) && HOSTNAME_KNOWN(client) == 0) {
|| (NOT_INADDR(tok) && string_match(tok, eval_hostname(host))));