Hi, following up the discussion on http://mail.python.org/pipermail/python-dev/2011-May/111642.html here'a patch to introduce shutil.chown() along with doc, tests and a change in os doc to link to the new function (I also took the occasion to rewrap os.chown() doc text). As of now only the one-file function is implemented, let's see at a later time what's about for a recursive one.

The patch was prepared against default, but it probably makes sense to backport it to 2.7?

Any comment/suggestion is welcome!