Description of domain configuration options

Configuration option = Default value	Description
[domain_config]
cache_time = 300	(IntOpt) TTL (in seconds) to cache domain config data. This has no effect unless domain config caching is enabled.
caching = True	(BoolOpt) Toggle for domain config caching. This has no effect unless global caching is enabled.
driver = sql	(StrOpt) Entrypoint for the domain config backend driver in the keystone.resource.domain_config namespace.