ruby/webrick: HTTP server toolkit

WEBrick is an HTTP server toolkit that can be configured as an HTTPS server, a proxy server, and a virtual-host server.WEBrick features complete logging of both server operations and HTTP access.WEBrick supports both basic and digest authentication in addition to algorithms not in RFC 2617.A WEBrick server can be composed of multiple WEBrick servers or servlets to provide differing behavior on a per-host or per-path basis. WEBrick includes servlets for handling CGI scripts, ERB pages, Ruby blocks and directory listings.WEBrick also includes tools for daemonizing a process and starting a process at a higher privilege level and dropping permissions.