Multiple PREFS_MODULE_NAME

[jayvdb]

There is a bit of variety in what people call their settings files.

django-allauth, django-rest-auth and django-rest-invitations all use app_settings.

While many other packages use settings.

It would be nice to be able to use PREFS_MODULE_NAME = ['app_settings', 'settings']

[idlesign]

Maybe we should support a more granular way.

PREFS_MODULE_NAMES = {
    '*': 'settings,
    'otherapp': 'apssettings',
}

or something. Need to think it over.

[jayvdb]

Ya, I would like that approach, to avoid lots of unneeded attempts at imports.