parse "gopher://null.host:0/\a\xfa\x99\xf2]'Y\xbe9\xb9\x81i)\xd5h6>nc\xdc\u0090\xd5\\\xad\xda\x1c\x13B\u007f\xea\x1f~\xcf)\x86\x1db\x13\x84\x88\x16\\綳": net/url: invalid control character in URL