parse "gopher://null.host:0/I&\xe0\xf2\xef\xfa\x9f&\xd3E\xe6\x02\xe1\x81\xe3\x8e9\xf4&R\x026\x15j$\xb9cV\x9e(\xb6\xf0\x88": net/url: invalid control character in URL