Title: #851: Update __init__.py.in
I don't know if it's easy or possible but wouldn't it be better to amend the
config API to internally synthetize the provider values, but does not write them to the
config file? Otherwise I'm sure we will forget when another provider is added..
See the full comment at https://github.com/SSSD/sssd/pull/851#issuecomment-516767396