The ldap_list documentation (
https://www.php.net/manual/en/function.ldap-list.php) says:
"An array of the required attributes, e.g. array("mail", "sn", "cn"). Note
that the "dn" is always returned irrespective of which attributes types are
requested. "
So passing null means we are not requesting any specific attributes, and
passing an empty array should work the same, right?
I tested it with just `[]` and it passed.
The ldap_modify error seems indeed related to the PHP bug. I will unblock
the transition in Ubuntu by skipping the specific tests, but I will keep
the bug open there and monitor the change on the PHP side.
