Update Makefile for correct test suite names.
[server] Clean up shutdown code, including race condition in
join-listeners and use close(sock, abort?: #t) rather than trying to
connect to listeners.
Merge pull request #78 from cgay/test-suite

[server] Fix race condition in join-listeners
exporting response-headers; useful for wiki and web-framework
Merge pull request #81 from rjmacready/export-response-headers

exporting response-headers; useful for wiki and web-framework
[client] Close client socket when with-http-connection exits
Merge pull request #83 from cgay/close-conn

[server] Shorten worker thread names to 'request worker n'
[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"