Fixed #11919 -- Added a DPASTE_URL setting to customize the dpaste featu...

...re.

https://code.djangoproject.com/ticket/11919
> (I guess the feature still won't work with arbitrary pastebins because of the particular set of post data names

Correct, it's also a closed project, so people can't fork it and use it as a private dpaste service easily.. Perhaps just adding a `ENABLE_DPASTE` setting would be enough?