stuck with ufs CHECK-HASH errors

[Don Lewis]

On  3 Dec, Kirk McKusick wrote:
> I am working on a fix. Hopefully have it in no more than a day.

I figured out that ufs_disk_fillout() and therefore sbread() in libufs
is never getting called.  Therefore the superblock used by cgput() is
all zeros.  If I change the call to ufs_disk_fillout_blank() in setup()
to ufs_disk_fillout() then things appear to work much better.