--link-dest non-optimal without --owner (or when not root)

[Stephen Gildea]

>  jw at pagasys.ws wrote:
>  cvs

I see it now in CVS (post-2.5.6).  Thank you.

However, this fix doesn't completely do what I want.  If I don't specify
--owner, then it works.  However, if I specify -a (implying --owner) but
am not root, then the linking still fails.

Perhaps the preserve_uid variable in rsync should be forced off unless
am_root is true.

 < Stephen