URL:
https://github.com/SSSD/sssd/pull/170
Title: #170: PROXY: Remove duplicit users from group
jhrozek commented:
"""
* master: ed2a5dad1ec82eda8a43ed8b0a05a6b01c3a6586
"""
See the full comment at
https://github.com/SSSD/sssd/pull/170#issuecomment-286761892