Time to remove COMPAT_386BSD_MBRPART

[David Holland <dholland-tech%netbsd.org@localhost>]

Now that netbsd-6 has been branched, I think it's time to remove
COMPAT_386BSD_MBRPART. This entails both the kernel code and some code
in disklabel(8) and sysinst. The kernel code has been disabled by
default for years; the disklabel(8) code was overlooked at the time
and disabled about a year ago (in both current and -5) after several
reports of trashed FreeBSD partitions were traced to it.

Does anyone object? It's been a good long time since the partition ID
changed.

-- 
David A. Holland
dholland%netbsd.org@localhost