Title: #390: NSS: Add option to disable memcache
We had this discussion several times. There are people who (at least
two weeks ago) wanted this feature. I know you provided a different workaround since then
and we should check if that customer uses the workaround.
And it was mentioned several times that there are other way how to achieve it without
changing sssd code. Therefore this PR should be rejected.
Adding label without closing it for now.
See the full comment at https://github.com/SSSD/sssd/pull/390#issuecomment-330958132