parse "gopher://null.host:0/²\xe0\x84\x89\bf\xe6\u0379O7\xbeH\xa8]y\xe8\xec\xf0\xfeh\xa2n\xd1\xc8=\xc5{xM=\x8b;-\a\xec`G\xd8": net/url: invalid control character in URL