[SSSD] [sssd PR#563][comment] SYSDB: Only check non-POSIX groups for GID conflicts

[fidencio]

  URL: https://github.com/SSSD/sssd/pull/563
Title: #563: SYSDB: Only check non-POSIX groups for GID conflicts

fidencio commented:
"""
master:
 8a8285c
"""

See the full comment at https://github.com/SSSD/sssd/pull/563#issuecomment-386420712