[SSSD] [sssd PR#516][synchronized] DESKPROFILE: Document it doesn't work when run as unprivileged user

[fidencio]

   URL: https://github.com/SSSD/sssd/pull/516
Author: fidencio
 Title: #516: DESKPROFILE: Document it doesn't work when run as unprivileged user
Action: synchronized

To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/516/head:pr516
git checkout pr516