parse "gopher://null.host:0/\u00830\x0e~\xf9\xf2\xf2\xf0\x12\x06\x10PE\x8e\x01\x8aW\xe8H\xa4b5\xf2N&CD\x17l\xab\xcc\x11\u009f@": net/url: invalid control character in URL