Azure plugin: validate the nonce before deleting a file
Azure plugin: validate the nonce before deleting a file

Don't use the presense of 'deleteBlob' to determine if a file should be
deleted. Instead, check for 'delete_blob' (which is the nonce key), and
verify the nonce with check_admin_referer(), which verifies that the
request came from within the admin with a valid referer and nonce.

mrgregwaugh/windows-azure-storage,mrgregwaugh/windows-azure-storage