[PATCH,HURD] mach: compliance fixes for nanosleep

[Roland McGrath]

In a log entry, write a local variable name as FOO rather than `foo'.

Write 'remaining != NULL' in tests.  Fix the existing cases while you're
there.

If the second __gettimeofday calls, return failure as it did before.

Since I've just seen it repeated here and in your select change, it seems
worthwhile to add internal inlines for converting timeval/timespec to
mach_msg_timeout_t with the EINVAL check.  So if you're looking for more
cleanup to do, that's a worthwhile thing to pursue.  But you don't have to
do that before completing this change unless you want to.


Thanks,
Roland