LDAP_BITOPT_DNS
*((int *) optdata) = LDAP_GET_BITOPT( ld, LDAP_BITOPT_DNS );
if (( ld->ld_options & LDAP_BITOPT_DNS ) != 0 && ldap_is_dns_dn( dn )) {
LDAP_SETCLR_BITOPT(ld, LDAP_BITOPT_DNS, optdata);