Auths list hard-coded to only include Cookie Authentication

https://github.com/humanmade/Restsplain/blob/804ab7253f596d436be474e9fe4a0ebfcdd45b3e/inc/rest-index.php#L106

There is no way to mark a page as belonging in the auths list other than modifying this file and adding additional keys to this `$data['authentication']` array. This means even auth pages generated by the plugin itself (oauth1 and broker) do not get listed correctly.