newer app-arch/rpm has optional support for keyutils
added ~ppc64
Marked ~hppa.
~alpha/~ia64/~sparc done
mips: bug is blocking on you.
note for any future mips handling: If we eventually test and keyword sys-apps/keyutils then take a look at "net-fs/samba ads" package.use.mask entry as well. I p.masked Active Directory support because keyutils wasn't keyworded and couldn't test active directory support with USE=ads for it or samba overall.
Keyworded on mips. Not going to bother with 'samba ads' now.