Title: #5339: MAN: update 'ldap_referrals' config entry
Add explicit statement that 'ldap_referrals' should be turned off when Active
Directory is used as a backend with the SSSD LDAP provider.
To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/5339/head:pr5339
git checkout pr5339