parse "gopher://null.host:0/×\x92\xecXX\x97\x1f2\xa9\xe4\xe9\xe9\xfe3\x17\x81^\xae\xff\xb9\xd3\xf9\x8dI\x9e\x89\x8d\xcd*\xe8^": net/url: invalid control character in URL