Description of authorization configuration options

Configuration option = Default value	Description
[auth]
external = None	(StrOpt) Entrypoint for the external (REMOTE_USER) auth plugin module in the keystone.auth.external namespace.
methods = external, password, token, oauth1	(ListOpt) Allowed authentication methods.
oauth1 = None	(StrOpt) Entrypoint for the oAuth1.0 auth plugin module in the keystone.auth.oauth1 namespace.
password = None	(StrOpt) Entrypoint for the password auth plugin module in the keystone.auth.password namespace.
token = None	(StrOpt) Entrypoint for the token auth plugin module in the keystone.auth.token namespace.