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:
Import devel/p5-Hash-Flatten version 1.16 as indirect dependency of
scheduled update of editors/p5-Padre-Plugin-Catalyst.

Converts back and forth between a nested hash structure and a flat hash of
delimited key-value pairs. Useful for protocols that only support key-value
pairs (such as CGI and DBMs).