ldap_is_dns_dn
int LDAP_CALL ldap_is_dns_dn(const char *dn);
if ( ldap_is_dns_dn( dn ) ) {
if ( ldap_is_dns_dn( dn ) || ( p = strchr( dn, '=' )) == NULL )
if (( ld->ld_options & LDAP_BITOPT_DNS ) != 0 && ldap_is_dns_dn( dn )) {