added custom script plus some debugging

class/availability.php

@@ -23,7 +23,7 @@ class availability
 					{
 						$log = INFO;
 					}
-					$device->availability = $value
+					$device->availability = $value;
 					logger($log, sprintf(_("Device: %s/%s is %s"), $topic, $fn , $value));
 				}
 			break;