[tests] Set server logging to $debug-level in make-server
[server] Remove some left over debug logging and add logging of rewritten urls.
[server] Log the request line at debug level
[server] Switch from 'logger' terminology to 'log'.
[server,common] Clarify some logging statements.
[server] Shorten worker thread names to "request worker n"
Merge pull request #84 from cgay/update-logging

Update logging
[server,client] Use a <request-method> class for request methods.
[tests] Tag tests that use the internet with 'online'.
[tests] Add comment about conflicting-listener-ips-test being expected to fail.
[server,client,common] Use <byte-string> instead of <symbol> for http method.