parse "gopher://null.host:0/\x15\xb6\xa8h\ue8973.\xb7k\xe4a\xd6g\xf9\"&p\x9b\xd4\x14\xe6-\x17\x81\x04\x94>\x8d\x95)\x9a\xb6)\xb9\xb4^\av\xcbYS3X\xaf'": net/url: invalid control character in URL