Title: #541: memberof: keep memberOf attribute for nested member
Sorry, this patch got stalled. I rebased it on top of current master.
All cases mentioned by @sumit-bose works correctly with this patch. I have not found any
problem and the users confirmed that it works a year ago :-)
See the full comment at https://github.com/SSSD/sssd/pull/541#issuecomment-478920065