# File lib/dnsruby/resolver.rb, line 509
    def set_config_nameserver(n)
      #  @TODO@ Should we allow NS RRSet here? If so, then .sort_by {rand}
      @config.get_ready unless @configured
      @configured = true

      @config.nameserver = n.kind_of?(String) ? [n] : n
      add_config_nameservers
    end