as tight as possible. Files we don't handle shouldn't be skipped.
- fonts.alias is not created automatically, so don't remove it.
- create fonts.encoding with mkfontdir using -e X11_ENCODINGSDIR.
On platforms not following the X11R6 loayout this might need to
be overriden.
- Fix type1inst calls.
- Modify packages which installed fonts.alias before to actually
include it in the PLIST and bump the revisions accordingly.
- Modify xorg-fonts* packages to use FONTS_DIRS.* to build indices
at run time.
Discussed with wiz and jlam.
