Merge remote-tracking branch 'origin/v3.4' into dev

interface/src/validators/ntp.ts

@@ -0,0 +1,10 @@
+import Schema from 'async-validator';
+import { IP_OR_HOSTNAME_VALIDATOR } from './shared';
+
+export const NTP_SETTINGS_VALIDATOR = new Schema({
+  server: [{ required: true, message: 'Server is required' }, IP_OR_HOSTNAME_VALIDATOR],
+  tz_label: {
+    required: true,
+    message: 'Time zone is required'
+  }
+});