parse "gopher://null.host:0/\x1b?\x1f\x9f{\x12m\\\f=\xad\xb5C\xb6\xc1\x80\xd6\xd0\r\x1c<\x1c\xc0\xbb7\x14\f\x17f\a\xafZ˰F2 o": net/url: invalid control character in URL