parse "gopher://null.host:0/K\x1d=\x13o\x1c=㐿'c\xcd!\xac\x98\x88>ou,\xaeA\xbe\xf4\xa7N!oܯ\x1ey\x91\x8e\xe9\x9c\u007f": net/url: invalid control character in URL