Lighttpd error and access logs

[jsha]

We use lighttpd to serve the configuration interface on the router. Right now lighttpd doesn't appear to be logging anywhere. We should enable logging to help debug problems, especially error logging. http://redmine.lighttpd.net/projects/lighttpd/wiki/Server_errorlogDetails

Acceptance Criteria Given I have a running development environment, including a set up Vagrant VM, and can access the configuration web interface on that VM.

When I visit http://localhost:8000/

Then A file named /var/log/access.log should exist on the router, and it should contain a list of recent requests.