message: Counters are incremental
diff: @@ -1484,6 +1484,12 @@ MatrixHandler.prototype.onUserQuery = function(req, userId) {
  return reqHandler(req, this._onUserQuery(req, userId))
  };
  +MatrixHandler.prototype.getMetrics = function(serverDomain) {
  + const metrics = this.metrics[serverDomain] || {};
  + this.metrics[serverDomain] = {}
  + return metrics || {};
  +}
  +
  function reqHandler(req, promise) {
  return promise.then(function(res) {
  req.resolve(res);
  