parse "gopher://null.host:0/\x15\x9b\xa1\x9d\xefI\xc7\xf1\xdaK\x9dar\xb0l.\xc0\xf1\xf2;\x88\x18.\xc9\x0eVvF\xeb\xa5*WWZĸi": net/url: invalid control character in URL