parse "gopher://\x84\x13\x14\x04\x18\xf8M\xf8u\x98\xdf\r\x18\xda\x17r\v\x04\x1b\x18\xe2\x06T\xb9\x01\xb5\xf7\x0f\xc6@\u12c6/": net/url: invalid control character in URL