This allows us to start WebServer on a port other than 8000, or multiple
instances of it at the same time :^)
Also print out what port was being used in the end.
We will now send a redirect (301) if a directory listing is requested and the
request URL doesn't end with a slash character. This makes relative file URLs
that we generate in directory listings actually work as expected.
This exposed an issue with the unveil() implementation which currently
short-circuits path resolution for any path containing "/..". This will
cause the ".." entry to show up with a 1970-01-01 mtime for now. FIXME.
Also add some rulers and a nice little footer. :^)
This server listens on port 8000 and serves HTML files from /www.
It's very simple and quite naive, but I think we can start here and
build our way to something pretty neat.
Work towards #792.
