Log message:
Bump all packages for perl-5.18, that
a) refer 'perl' in their Makefile, or
b) have a directory name of p5-*, or
c) have any dependency on any p5-* package

Like last time, where this caused no complaints.

Log message:
Drop superfluous PKG_DESTDIR_SUPPORT, "user-destdir" is default these days.

Log message:
Adding new package for CPAN module Import::Into version 1.001000 into
devel/p5-Import-Into.

Writing exporters is a pain. Some use Exporter, some use Sub::Exporter,
some use Moose::Exporter, some use Exporter::Declare ... and some things
are pragmas.

If you want to re-export other things, you have to know which is which.
Exporter subclasses provide export_to_level, but if they overrode their
import method all bets are off. Sub::Exporter provides an into parameter
but figuring out something used it isn't trivial. Pragmas need to have
their import method called directly since they affect the current unit
of compilation.

It's ... annoying.

However, there is an approach that actually works for all of these types.