HOSTNAME_KNOWN
if (NOT_INADDR(server) == 0 || HOSTNAME_KNOWN(server)) {
if (NOT_INADDR(client) && HOSTNAME_KNOWN(client) == 0) {
if (HOSTNAME_KNOWN(hostname)) {
return (STR_NE(eval_hostaddr(host), unknown) && HOSTNAME_KNOWN(name));
return (strchr(name, '.') == 0 && HOSTNAME_KNOWN(name));