mkdynamic/omniauth-facebook — pull request #58 by JHeidinga (2012-06-08 06:32:19+00:00)
Title: Add support of the :auth_type option to :authorize_options

http://developers.facebook.com/docs/authentication/reauthentication/
auth_type: this parameter specifies the requested authentication features (as a comma-separated list). Valid options are:

https - checks for the presence of the secure cookie and asks for re-authentication if it is not present
reauthenticate - asks the user to re-authenticate unconditionally