def moderateMail(request):
    """
           Processes an HTTP request for information on what to do with a
           specific mail message in the moderation queue.  Expects the request
           to contain an 'action' ('approve' or 'discard'), a 'pin' used to
           authenticate the moderator, and an 'mid' which is the id of the
           mail object in the moderation queue.  Expects a request variable
           'Mail' containing the mail message with headers
        """
