> > Adds two options (-h/-H and -t) to update-plist.

-H is already there but not documented (at least in the update-plist
manual), what do these options do?

it would be nice if we can split to subpackages by install path.
python, mariadb, erlang all have directories where any new files
should be directed to specific plists (respectively: tests, tests,
wx) and it would be great if that could be encoded in the Makefile.