Title: #109: SSSCTL: fix netgroup-show parsing
Thank you for the patch. Since we already have the full entry object in sysdb_attrs I
think it would be better to take a look at the objectclass (`sysdb_attrs_get_string(entry,
"objectclass", &oc)`) and only if the class is user or a group, format the
name, else print the original name.
See the full comment at https://github.com/SSSD/sssd/pull/109#issuecomment-267015221