optimize MULTISITE_CMS_* settings

[jedie]

The default from README:

MULTISITE_CMS_URLS={
    'www.example.com': 'tests.test_utils.urls1',
    'www.example2.com': 'tests.test_utils.urls2',
},
MULTISITE_CMS_ALIASES={
    'www.example.com': ('alias1.example.com', 'alias2.example.com',),
    'www.example2.com': ('alias1.example2.com', 'alias2.example2.com',),
},
MULTISITE_CMS_FALLBACK='www.example.com'

1. You have to insert three times www.example.com -> What's about DRY ?
2. You didn't see the SITE_ID

What's about something like this:

MULTISITE_CMS={
    1: { # SITE_ID == 1
        'DOMAIN': 'www.example.com',
        'URLS': 'example_project.urls1',
        'ALIASES': ('alias1.example.com', 'alias2.example.com',)
    },
    2: {  # SITE_ID == 2
        'DOMAIN': 'www.example2.com',
        'URLS': 'example_project.urls2',
        'ALIASES': ('alias1.example2.com', 'alias2.example2.com',)
    },
}
MULTISITE_CMS_FALLBACK=1 # SITE_ID == 1

[yakky]

Thanks for the suggestion

[jedie]

...we have already multisite.models.Alias to match alias to SITE_ID's:

https://github.com/ecometrica/django-multisite/blob/master/multisite/models.py#L151

So MULTISITE_CMS_ALIASES is redundant, isn't it?

[yakky]

@jedie it partially is: you can use one instead of the other. Sometimes you just don't need to work in the admin to handle this, and just use some settings
Currently I have no capacity to handle the change to the suggested configuration structure, but I will gladly accept a PR