facebook/wordpress — pull request #478 by niallkennedy (2013-08-18 18:02:45+00:00)
Title: support app secret proof with app access token requests

Hash an app access token with app secret to generate [an app secret proof](https://developers.facebook.com/docs/reference/api/securing-graph-api/ "Facebook: securing Graph API calls"). Include the hash in future app access token server-to-server calls.