Look at moving dpkg-hook to /etc/dpkg/dpkg.cfg.d/

[mckinney-subgraph]

Currently, the dpkg hook to run paxrat is called by apt. This is disadvantageous because it won't run when packages are installed manually using dpkg -i.

We should look at trying to move (or duplicate) the hook into the /etc/dpkg/dpkg.cfg.d/ directory so that it is run by dpkg directly.

Potential problems:

1. dpkg already has a post-invoke, is it possible to add others?
2. Performance: does it result in paxrat being run more often? Does this noticeably impact the performance of apt operations?