URL:
https://github.com/SSSD/sssd/pull/132
Title: #132: Add "Wants=" to sssd unit
lslebodn commented:
"""
BTW the second patch had to be also removed because required functions were in newer
versions of systemd which are not in CentOS
"""
See the full comment at
https://github.com/SSSD/sssd/pull/132#issuecomment-274812500