When you generate your project, Django generates a sample settings.py
that contains the settings you're most likely going to need to
override -- things that involve paths, the list of apps you want to
install, and so on.
There are *many* other settings that can form part of a Django project
-- they're all documented at the last link you provided. You can put
any of these settings in your own settings.py file. If you don't
provide them, the default value is used; if you do, your value is
used.
If you want, you can even invent your own settings for your own app.
This might be handy for storing things like authentication keys for
third-party services.
So - just put:
APPEND_SLASH = False
PREPEND_WWW = True
in your project's settings.py file, and you'll be off and running.
Yours,
Russ Magee %-)