Title: #5711: [Backport][ipa-4-9] ipaserver/install/dns: handle SERVFAIL when checking
This PR was opened automatically because PR #5708 was pushed to master and backport to
ipa-4-9 is required.
To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/5711/head:pr5711
git checkout pr5711