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

[Roland McGrath]

I think the change is fine in theory.

I didn't actually try to read the patch.  For such cases, I think it would
be helpful to use 'git diff -M' so the plain renamings are obvious in the
patch.  (People testing at home can use 'git apply' on such patches.)

I don't think this should be committed until the build has been actually
tested on Hurd--even if that requires waiting until we've merged in more
pending Hurd patches.


Thanks,
Roland