marcperrinoptel

I've opened this on Django side [https://code.djangoproject.com/ticket/34341](https://code.djangoproject.com/ticket/34341), might help deciding whether to fix on Django side vs. whitenoise side.

The probable takeaway from the discussion on Django side is that `finders.find()` is really supposed to be called with an OS-standardized path. Here's my pull request to address that: [https://github.com/evansd/whitenoise/pull/474](https://github.com/evansd/whitenoise/pull/474)