message: link to doc issue
diff: @@ -72,6 +72,7 @@ async function checkIdentityServerUrl(url) {
  request(
  // also XXX: we don't really know whether to hit /v1 or /v2 for this: we
  // probably want a /versions endpoint like the C/S API.
  + // https://github.com/matrix-org/matrix-doc/issues/1665
  { method: "GET", url: isUrl + '/_matrix/identity/api/v1' },
  (err, response, body) => {
  if (err) {
  