added constant ALL for all mosquitto log levels

moha.php

@@ -51,6 +51,7 @@ define( "INFO", $client->LOG_INFO);
 define( "NOTICE", $client->LOG_NOTICE);
 define( "WARNING", $client->LOG_WARNING);
 define( "ERROR", $client->LOG_ERR);
+define( "ALL", DEBUG | INFO | NOTICE | WARNING | ERROR);
 $logLevel = DEBUG;
 
 // defining callback functions