open_server

# File lib/drb/drb.rb, line 853
    def self.open_server(uri, config)
      uri = 'druby://:0' unless uri
      host, port, _ = parse_uri(uri)
      config = {:tcp_original_host => host}.update(config)
      if host.size == 0
        host = getservername
        soc = open_server_inaddr_any(host, port)
      else
        soc = TCPServer.open(host, port)
      end
      port = soc.addr[1] if port == 0
      config[:tcp_port] = port
      uri = "druby://#{host}:#{port}"
      self.new(uri, soc, config)
    end