[SSSD] [sssd PR#920][opened] Add comment to workaround for libsemanage issue

[elkoniu]

URL: https://github.com/SSSD/sssd/pull/920
Author: elkoniu
 Title: #920: Add comment to workaround for libsemanage issue
Action: opened

PR body:
"""
libsemanage < 2.6 use to not set right file mask in our usecase.
It has been fixed by manual umask() call but is no longer needed.
Fix will be keept as a precaution for future libsemanage versions.

Related bug: https://bugzilla.redhat.com/show_bug.cgi?id=1186422
Related issue: https://pagure.io/SSSD/sssd/issue/3583
"""

To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/920/head:pr920
git checkout pr920