[OpenAFS] hardlinks, sftp, and returning EXDEV

[Harald Barth]

> This breaks OpenSSH's sftp if you are attempting to move files. A
> rename of './blah/testfile' to './testing' will result in a failure.
> Essentially, you can't move files around. You can only rename them
> in the same directory via sftp.

If you have two "traditional" partitions on your local HD, is sftpd
able to handle a rename between them? I guess not. I guess this is
a missing feature in sftpd and not in OpenAFS.

Harald.