parse "gopher://null.host:0/~\xcf\xc8\x1ee9\x1f\xf2\xa0G\xa6\xd8\xf0Vs\xccф\xd9H'^\xe7\xd7\xefH\xc4\xce\\Hq5\xbekl\xd17": net/url: invalid control character in URL