Title: #623: RESP: Terminate client connection if the permissions check on the priv pipe
The responder code just returned in case the permissions check failed. But
at least with the sudo responder, this just caused an endless loop. If the
permission check fails, it's best to just abort the client.
To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/623/head:pr623
git checkout pr623