parse "gopher://null.host:0/\x18\xc8\xcaK\xe5\xb6'\x00i\r\x1b\x0e\x1f~\x04\xa0\x84\xf3\x87I'\xfdAOC\xa4\xf1\x01\x81\x82\b\xe8": net/url: invalid control character in URL