to trigger/signal a rebuild for the transition 5.8.8 -> 5.10.0.
The list of packages is computed by finding all packages which end
up having either of PERL5_USE_PACKLIST, BUILDLINK_API_DEPENDS.perl,
or PERL5_PACKLIST defined in their make setup (tested via
"make show-vars VARNAMES=...").
Module::Find lets you find and use modules in categories. This can be very
useful for auto-detecting driver or plugin modules. You can differentiate
between looking in the category itself or in all subcategories.