have to use LDAP_OPT_X_TLS_NEVER to defeat cert hostname checking
Even though the ldap.conf man page is not really clear about this,
looking at the code in libraries/libldap/tls2.c:ldap_int_tls_start()
if you don't specify LDAP_OPT_X_TLS_REQUIRE_CERT as
LDAP_OPT_X_TLS_NEVER it will check the hostname