Log message:
Bump the PKGREVISION for all packages which depend directly on perl,
to trigger/signal a rebuild for the transition 5.10.1 -> 5.12.1.

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=..."), minus the packages updated after
the perl package update.

sno@ was right after all, obache@ kindly asked and he@ led the
way. Thanks!

Log message:
Provides two functions to show reference counts of Perl objects.

This can be handy when testing/debugging and you want to know what the heck
is going on.

This is a trivial module. The documentation is longer than the code. Heck,
the BSD license at the top of the file is longer than the code. It took
longer to make it release-ready than it took to write it.

Provides:
  - refcount
  - refcount_sv