Better Error messages for 1.2 deprecations
|Reported by:||PaulM||Owned by:||jezdez|
|Has patch:||no||Needs documentation:||no|
|Needs tests:||no||Patch needs improvement:||no|
As we move to 1.4 and change the required settings file format significantly, we need to provide better error messages for deprecated methods we've actually removed. In particular, both the database and cache settings provide opaque "backend not found" when a settings file uses the old style settings. This is incredibly frustrating to people who are not deeply familiar with Django settings files, or who didn't read the release notes for 1.2.