# File lib/drb/drb.rb, line 839
    def self.open_server_inaddr_any(host, port)
      infos = Socket::getaddrinfo(host, nil, 
                                  Socket::AF_UNSPEC,
                                  Socket::SOCK_STREAM, 
                                  0,
                                  Socket::AI_PASSIVE)
      family = infos.collect { |af, *_| af }.uniq
      case family
      when ['AF_INET']
        return TCPServer.open('0.0.0.0', port)
      when ['AF_INET6']
        return TCPServer.open('::', port)
      else
        return TCPServer.open(port)
      end
    end