# File lib/httpclient/auth.rb, line 229
    def set(uri, user, passwd)
      if uri.nil?
        @cred = ["#{user}:#{passwd}"].pack('m').tr("\n", '')
      else
        uri = Util.uri_dirname(uri)
        @auth[uri] = ["#{user}:#{passwd}"].pack('m').tr("\n", '')
      end
    end