Override `HTTPAdapter.request_url`, so that it doesn't call `select_proxy`. Fixes: GH-21 See: https://github.com/kennethreitz/requests/issues/3131#issuecomment-214792914
Override `HTTPAdapter.request_url`, so that it doesn't call `select_proxy`. Fixes: GH-21 See: https://github.com/kennethreitz/requests/issues/3131#issuecomment-214792914