Add option 0 to command Timers

6.0.0a
* Add option 0 to command Timers disarming all timers (#2962)

sonoff/_releasenotes.ino

@@ -1,4 +1,5 @@
 /* 6.0.0a
+ * Add option 0 to command Timers disarming all timers (#2962)
  * Add time in minutes to rule Time#Initialized, Time#set and Time#Minute (#2669)
  * Add rule variables %time% for minutes since midnight, %uptime%, %sunrise% and %sunset% giving time in minutes (#2669)
  * Add heap and stack debug information

sonoff/xdrv_09_timers.ino

@@ -451,6 +451,11 @@ boolean TimerCommand()
     }
   }
   else if (CMND_TIMERS == command_code) {
+    if (XdrvMailbox.data_len && (XdrvMailbox.payload == 0)) {
+      for (byte i = 0; i < MAX_TIMERS; i++) {
+        Settings.timer[i].arm = 0;  // Disable all timers
+      }
+    }
     byte jsflg = 0;
     byte lines = 1;
     for (byte i = 0; i < MAX_TIMERS; i++) {