Split the logging settings docs into module-level docs.

Review Request #7596 — Created Aug. 16, 2015 and submitted — Latest diff uploaded

Information

Djblets
release-0.9.x

Reviewers

The LoggingMiddleware docs had a number of settings that weren't related
to the middleware, and including them in the class docstring broke
Sphinx's autodoc support. This has been moved into the djblets.log
module documentation.

Built the docs and looked through it.