[docs] [issue10433] Document unique behavior of 'getgroups' on OSX

Changes by Alexander Belopolsky <belopolsky@users.sourceforge.net>: ---------- assignee: -> docs@python components: +Documentation, Macintosh nosy: +docs@python versions: +Python 3.2 _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue10433> _______________________________________