Comment 4 for bug 1372286

Attached the full-fledged perl script I cooked up to investigate obsolete conffiles.

grep the output, it doesn't take options.

When removing them, it often leaves empty directories, so don't forget to remove them, too. (If they aren't owned by some other package... check with dlocate, or add support to my script for walking up a path and checking.)

 I *highly* recommend etckeeper to save your bacon if you delete something and then wish you hadn't.
sudo git checkout master~4 -- bash_completion.d/mercurial
 was far more convenient than re-installing the package. And you have a record of what you did.