HTTP/1.1 401 Unauthorized
Server: Apache
Date: Wed, 09 Dec 2015 03:29:14 GMT
Content-Type: text/plain; charset=utf-8
Connection: keep-alive
Link: </token>; rel="oauth2-token"

This page uses the "oauth2-token" rel value defined in https://tools.ietf.org/html/draft-wmills-oauth-lrdd-07