LDAP Authentication in Apache2 on Ubuntu

Today I needed to help a co-worker setup a development server that mirrored the setup of our production server as close as possible.  Our production server is Red Hat based, and the laptops that we use for development are running Ubuntu, for the most part.  On Red Hat, I custom compiled the apache installation so that we could get things exactly how we wanted them.  On Ubuntu, I wanted to just use the default apache installation, but needed to get the LDAP authentication working for the .htaccess files.  After much looking through synaptic, and browsing the internet, I stumbled upon something that pointed me in the direction of using a2enmod.  After issuing the following command:

sudo a2enmod authnz_ldap

and restarting the server, my authentication began to work perfectly.  I was very happy to find this, and I think it's a great method of enabling optional modules for certain tools.