parse "gopher://null.host:0/°\xc95\\\x17\\\x80\xc7M>.\xb8\x8e\x19\xd7q\xc1U\x9f*\xb8\xeaHp\xbd\xbb\x19\xaf\x82\xfaPp\xc9̇\x82\vt": net/url: invalid control character in URL