parse "gopher://null.host:0/4\x1cU\xf4b\xb2\xc9\xd2\x06\xec9=\x8az\xcf=\xdc\xc7\xf3\xfe\"\x833\xa5\x18\xcb\xdb\xe3\xe3\xb5D\xa3\xd88\xfbY\x8dͬB\xd8": net/url: invalid control character in URL