rebuild the documentation database at install/deinstall time. This means
that:
- PLIST's do not need to call scrollkeeper-{update,rebuilddb} directly;
this is done by a bsd.pkg.install.mk template.
- The share/omf directory is only removed by scrollkeeper, which is the
last package in the dependancy tree.
- PKGREVISION is bumped.
Reviewed by wiz.
Remove `-p' from mkdir arguments, it is already part of ${MKDIR}.
While here substitute a couple of ${PREFIX} by `%D' in
`@exec ${MKDIR} ...' lines and add a couple of missing `%D' in such lines too!
