parse "gopher://null.host:0/7\xc2\xe6X,\xaf\x17)\x0f\xe6\xe3x\xbf\x98\x8fX\x87J\x86\x80\"\xa1|5=\xa7\xbem9\x0f\x1aM\x10\x02": net/url: invalid control character in URL