- Fix a logic error that instead of reporting the *first*
metadata-setting error that appears, we were instead reporting the
*last* error (and only if the lchown call failed!).
- Don't show any errors when setting metadata for files in non-root
mode (things like timestamps, attributes). Previously, only lchown
errors were skipped. But other kinds of attribute errors make sense
to skip as well. The code path happened to work correctly before
because of the above logic error. But once that was fixed, this
change needed to happen too.
