Add www/go-www: Web server for static content

www is a static web server, useful for sharing and testing the contents of a
directory via HTTP.

www will start a web server listening on port 8000 and use as document root
the directory where the command was called. Different document root may be
specified as also the port and use of SSL, more info using the -h option.

WWW: https://github.com/nbari/www

PR: 214820
Submitted by: Nicolas de Bari Embriz Garcia Rojas