rsync-3.1.0 --chown, --usermap, and --groupmap ignored?

[Jed Brown]

Paul Slootman <paul+rsync at wurtel.net> writes:
> No, because you're not running the rsync command as the superuser,
> and not using the --owner / --group options.

Thanks, adding --group works, and --owner --super is sufficient to
generate an error when attempting to change the user permissions.  I
would suggest that the docs for --chown would do well to mention that
--owner (--super) and --group are needed in order to have the effect
stated in the first sentence.

   --chown=USER:GROUP
          This option forces all files to  be  owned  by  USER  with  group
          GROUP.   This  is  a  simpler  interface than using --usermap and
          --groupmap directly, but it is implemented  using  those  options
          internally,  so you cannot mix them.  If either the USER or GROUP
          is empty, no mapping for the omitted user/group will  occur.   If
          GROUP is empty, the trailing colon may be omitted, but if USER is
          empty, a leading colon must be supplied.

          If you specify "--chown=foo:bar, this  is  exactly  the  same  as
          specifying "--usermap=*:foo --groupmap=*:bar", only easier.
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