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=...").
This is primarily so that p5-Net-Z3950-ZOOM can compile without
having pkgsrc-wip checked out (oops!).
MARC::Record provides yet another collection of routines to process MARC
records.