message: use URL instead of creating new a element
diff: @@ -260,12 +260,7 @@ function getServerName(userId) {
  function getHostnameFromMatrixDomain(domain) {
  if (!domain) return null;
  -
  - // The hostname might have a port, so we convert it to a URL and
  - // split out the real hostname.
  - const parser = document.createElement('a');
  - parser.href = "https://" + domain;
  - return parser.hostname;
  + return new URL(`https://${domain}`).hostname;
  }
  function isHostInRegex(hostname, regexps) {
  