* Use a new read-only account instead of the admin LDAP account
* Disable the LDAPAuthorization plugin. The LDAPAuthentication2 plugin
is still used to authenticate users, but every kosmos.org user has
access to the wiki. See
https://www.mediawiki.org/wiki/Extension:PluggableAuth for the
distinction between authentication and authorization
Refs #127
Users can log in using their LDAP account (in the
ou=users,dc=kosmos,dc=org group and with the wiki attribute set to
enabled)
Add an attribute for the ldap master server, so it can be overridden in
the development environment
Refs #107
