Allow request with no self._location if explicit URL is provided.
Allow request with no self._location if explicit URL is provided.

shinglyu/moztrap,bobsilverberg/moztrap,shinglyu/moztrap,mozilla/moztrap,shinglyu/moztrap,mozilla/moztrap,mccarrmb/moztrap,mozilla/moztrap,mccarrmb/moztrap,bobsilverberg/moztrap,shinglyu/moztrap,mccarrmb/moztrap,mozilla/moztrap,bobsilverberg/moztrap,bobsilverberg/moztrap,mccarrmb/moztrap,mccarrmb/moztrap,shinglyu/moztrap,mozilla/moztrap