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.
But please don't close the pull request.
See the full comment at https://github.com/SSSD/sssd/pull/390#issuecomment-330938365