[SSSD] [sssd PR#194][opened] config-check: Message when sssd.conf is missing

[mzidek-rh]

URL: https://github.com/SSSD/sssd/pull/194
Author: mzidek-rh
 Title: #194: config-check: Message when sssd.conf is missing
Action: opened

PR body:
"""
sssctl config-check should print a message for user
if no sssd.conf was found.

Resolves:
https://pagure.io/SSSD/sssd/issue/3330
"""

To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/194/head:pr194
git checkout pr194