Flatten sysdeps/unix/bsd/bsd4.4 into sysdeps/unix/bsd

[Roland McGrath]

[Note: I am travelling this week, so I will not participate very
usefully in any protracted discussion before next week.]

My position on this has not changed.  Moving files that are only
Mach-specific and not really Hurd-specific from mach/ to mach/hurd/ is
just wrong to me.  As I said before, I think the right solution here
is to leave mach/ and mach/hurd/ files where they are, and instead
work out the new sysdeps directory selection scheme such that the
directory ordering does what we want.

The consolidation of bsd/bsd4.4/ files into bsd/ doesn't cause any
problems, so they truly incremental first step is to do just that
alone first.


Thanks,
Roland