parse "gopher://null.host:0/\u0080\f\xc4'4\x83R]bB\xc8\x1d\x18\b\xc1\xfe\xa9\xca-\xec\xc8-\x8c\x85\xfd\xa2pqu\xbf\xc3*\xff\xf1\xdf": net/url: invalid control character in URL