parse "gopher://null.host:0/\x17,b\x19\xb5\xff\xf3\aC\x11\x89\xe3\xaa\x03g\xb3U\xab^:8W҇_\x80\xd0W\xdeqQ\x82\xfe\xc5dC\xfc\xe7": net/url: invalid control character in URL