Flickr: Update to use required SSL endpoints.


git-svn-id: https://plugins.svn.wordpress.org/keyring/trunk@943703 b8457f37-d9ea-0310-8a92-e5e31aec5664
License: Make a note that Keyring is under a GPL license (has always been, per requirements of the WP.org directory).


git-svn-id: https://plugins.svn.wordpress.org/keyring/trunk@943706 b8457f37-d9ea-0310-8a92-e5e31aec5664