New live stat: Total new users today

* Add NT (Obv/2 throwback) MCI for new users today
* Keep live stat up to date in stat log
* Exposed via WFC

core/misc_scheduled_events.js

@@ -10,7 +10,12 @@ function dailyMaintenanceScheduledEvent(args, cb) {
     //
     //  Various stats need reset daily
     //
-    [ SysProps.LoginsToday, SysProps.MessagesToday ].forEach(prop => {
+    //  :TODO: files/etc. here
+    const resetProps = [
+        SysProps.LoginsToday, SysProps.MessagesToday, SysProps.NewUsersTodayCount,
+    ];
+
+    resetProps.forEach(prop => {
         StatLog.setNonPersistentSystemStat(prop, 0);
     });