Add stronger accomodation for broken modes in distfile.

On OS X 10.9, the find command to repair directory modes fails,
apparently because the directory is 600, without even the owner x bit.
Add an extra chmod to fix that before the find.  (No PKGREVISION++,
because the binary package will be unchanged if it built before.)
As of yesterday, OpenBSD stopped supported hp300, mvme68k, and mvme88k.
Update patterns.

From jmc@OpenBSD.

Bump version.
Updated textproc/mdoclint to 1.28