ldap_utils.php should do error checking for mandatory variables

[ahelsing]

The ldap_setup() function in /usr/share/geni-ar/lib/php/ldap_utils.php requires a number of variables to be correctly set in /etc/geni-ar/settings.php. If the variables are not correctly set for whatever reason, ldap_setup() attempts a bind with null variables, and fails with no indication of why the bind failed.

It would be helpful if ldap_setup() did a check for whether each of the config variables it requires was zero-length, and failed with an error saying that (rather than just "LDAP bind failed") if variables were undefined.

Imported from trac ticket #21, created by chaos on 09-08-2013 at 15:53, last modified: 04-02-2014 at 15:21