Description of policy configuration options

Configuration option = Default value	Description
[DEFAULT]
policy_default_rule = default	(StrOpt) Default rule. Enforced when a requested rule is not found.
policy_dirs = ['policy.d']	(MultiStrOpt) Directories where policy configuration files are stored. They can be relative to any directory in the search path defined by the config_dir option, or absolute paths. The file defined by policy_file must exist for these directories to be searched.
policy_file = policy.json	(StrOpt) The JSON file that defines policies.