It looks like I installed the wrong version of the module using apxs2.
Once it's disabled (a2dismod), how do I remove it so I can install the correct version?
Seems elementary, yet...somehow...I'm finding nothing on Google, IRC, etc.
It's so simple nobody has written it down yet. You just remove the .so file from /usr/lib/apache2/modules/.
And if you want to be thorough, remove anything that might be in: /usr/share/doc/module-name