This Authentitation / Authorization module provides the ability to let
the webserver (e.g. Apache) do the user Authentication (using Kerberos
f.e.) and let libreNMS do the Authorization of the already known user.
Authorization and setting of libreNMS user level is done by LDAP group
names specified in the configuration file. The group configuration is
basicly copied from the existing ldap Authentication module.
To save lots of redundant queries to the LDAP server and speed up the
libreNMS WebUI, all information is cached within the PHP $_SESSION as
long as specified in $config['auth_ldap_cache_ttl'] (Default: 300s).
Signed-off-by: Maximilian Wilhelm <firstname.lastname@example.org>