There's no standard Django way, so it would be finding the best Pythonic way to do it. Akin to local_settings.py, but a bit different.

However, it might be more mess than it's worth, now that I look through it (e.g. would be hard to cleanly rework the `"%s.custom_context_processors.custom" % ("central" if CENTRAL_SERVER else "main")`). Unless we went with completely separate (fully independent) settings files for distributed and central, but then we'd have to keep them in sync.