parse "gopher://=\f(\xa8\x1d\xff\xc4S\xf8\xa2D+\xb7\xf2\xbf&\x9c`\xe2H\x01\xf9*r\xf9r\xae\x9d\xa8\x8e\xd8j{u&$`/": net/url: invalid control character in URL