p4raw-id: //depot/perl@32283
aren't found by podchecker. Add this check to podchecker, get rid of
checkpods and have C<make check> use podchecker.
+=head2 perlmodlib.PL rewrite
+
+Currently perlmodlib.PL needs to be run from a source directory where perl
+has been built, or some modules won't be found, and others will be
+skipped. Make it run from a clean perl source tree (so it's reproducible).
+
=head2 Parallel testing
(This probably impacts much more than the core: also the Test::Harness