def handle_ignored_resources(self):
        """Ignore robots.txt and favicon.ico GET requests based on a list of
        absolute paths in :attr:`IGNORED_PATHS`. Aborts the request with a 404
        status code.

        This is mostly a usability issue to avoid extra log entries for
        resources we are not interested in.

        :raises: :class:`webob.exceptions.ResponseException` of status 404 if
                 the resource is ignored.
        """
        if (self.method in ('GET', 'HEAD') and
                self.request.path_qs in self.IGNORED_PATHS):
            raise_404(self)