Description of configuration options for auth

Configuration option = Default value	Description
[auth]
external = keystone.auth.plugins.external.DefaultDomain	(StrOpt) The external (REMOTE_USER) auth plugin module.
methods = external, password, token	(ListOpt) Default auth methods.
password = keystone.auth.plugins.password.Password	(StrOpt) The password auth plugin module.
token = keystone.auth.plugins.token.Token	(StrOpt) The token auth plugin module.