SECURITY UPDATE

* Handle failed login attempts via Telnet
* New lockout features for >= N failed attempts
* New auto-unlock over email feature
* New auto-unlock after N minutes feature
* Code cleanup in users
* Add user_property.js - start using consts for user properties. Clean up over time.
* Update email docs

core/stat_log.js

@@ -68,6 +68,7 @@ class StatLog {
         };
     }
 
+    //  :TODO: fix spelling :)
     setNonPeristentSystemStat(statName, statValue) {
         this.systemStats[statName] = statValue;
     }