message: Dedupe key ports before reserving
diff: @@ -73,9 +73,9 @@ async function exportPrometheusMetrics(registry: prometheus.Registry, port): Pro
  function reserveAccessKeyPorts(
  keyConfig: json_config.JsonConfig<AccessKeyConfigJson>, portProvider: PortProvider) {
  - for (const accessKeyJson of keyConfig.data().accessKeys || []) {
  - portProvider.addReservedPort(accessKeyJson.port);
  - }
  + const accessKeys = keyConfig.data().accessKeys || [];
  + const dedupedPorts = new Set(accessKeys.map(ak => ak.port));
  + dedupedPorts.forEach(p => portProvider.addReservedPort(p));
  }
  // TODO: Get rid of this after 30 days of everyone's migration to Prometheus.
  