LDAPTLS
lu->protocol = LDAPTLS;
if (url->protocol == LDAPTLS) {
if (url->protocol == LDAPTLS || url->protocol == LDAPS) {
lu->protocol = LDAPTLS;
ldap.ldap_protocol = LDAPTLS;
lu->protocol != LDAPTLS) {
} else if (lu->protocol == LDAPTLS)
lu->protocol = LDAPTLS;