with the ffs kernel module and follows the trend of retiring ufs.
It also allows to get rid of a special case kludge in runtime module
loading, since ufs was not really a module. librumpfs_ufs is now
obsoleted and ffs consumers should be linked solely against
librumpfs_ffs.
Based on PR port-powerpc/40421 from Wojciech Galazka,
with misc tweaks by me.
Note sysinst part is not pulled because there is
no supported storage device yet on this port.
* Don't change METALOG in place while creating METALOG.sanitised in the
sanitise_METALOG target. This makes it easier to manually inspect
METALOG to find the order in which lines were added during a build.
* Add a clean_METALOG target, to be invoked from src/Makefile early in
the build, to prevent unbounded growth of METALOG during multiple
MKUPDATE builds.
* Remove the old hack of incorporating etc/mtree/NetBSD.dist into
METALOG.sanitised. It was needed only during a short transition
period when people might have done MKUPDATE builds starting from
existing DESTDIR and OBJDIR trees that had been created before
revision 1.317 of src/etc/Makefile.
* Since etc/mtree/NetBSD.dist is no longer added, there's will not
be any "optional" lines, so there's no need to filter them from
METALOG.sanitised.
* There's no need for two different METALOG.unpriv and
METALOG.sanitised.unpriv variables; combine them into a single
METALOG.unpriv variable whose value is "-M ${METALOG}.sanitised".
* Reorder some lines in the Makefile, to bring related targets,
variables and comments together.
tsutsui