[Samba] Winbind missing secondary groups depending on case & distro

[Chris Smith]

Possibly just a quirk with the "id" utility.

The version I tested with:
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$ id --version
id (GNU coreutils) 6.7
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software.  You may redistribute copies of it under the terms of
the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted by law.

Written by Arnold Robbins and David MacKenzie.
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Chris