Bump PKGREVISION.

Fix build on OpenBSD/amd64 5.2.

* buildlink to devel/zlib
* On OpenBSD, add -lz to LDFLAGS
Updated fonts/harfbuzz to 0.9.9nb1
Damn Perl mixed case modules.  I missed that this was already in the tree
as p5-Perl-Tidy.
Remove perltidy.  Turned out to be a duplicate of p5-Perl-Tidy.