Title: #799: Backport of configurable prompting to sssd-1-16
The backport was not exactly trivial, so I'm opening a separate PR. The last patch
with the test is missing completely at this point, we also would need to backport
657f3b89bca9adfb13f0867c91f1d76845d2d6dd at least partially.
To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/799/head:pr799
git checkout pr799