Refactoring on the nginx module, including:
- Better handling larger posts;
- Now using nginx echo module during the regression tests.
- Better interacting with neginx chain rules
- Separation of the request handling and content filters.
- Better handling nginx sessions and resource counts to allow a
more efficient garbage collector.
- Handling both http/1.0 and 1.1, including keep-alive.
- Tests are now capable to test nginx as a proxy or end-server.
- Tested agains nginx 1.6 and 1.7.
