Description of configuration options for oauth

Configuration option = Default value	Description
[oauth1]
access_token_duration = 86400	(IntOpt) Duration (in seconds) for the OAuth Access Token.
driver = keystone.contrib.oauth1.backends.sql.OAuth1	(StrOpt) Credential backend driver.
request_token_duration = 28800	(IntOpt) Duration (in seconds) for the OAuth Request Token.