Enable systems to configure their packet type

config/app.php

@@ -20,6 +20,7 @@ return [
 
     // Number of messages in a packet that will result in them being queued for processing
     'queue_msgs' => env('FIDO_QUEUE_MSGS', 50),
+    'default_pkt' => env('FIDO_DEFAULT_PACKET', '2+'),
 
     /*
     |--------------------------------------------------------------------------
@@ -242,4 +243,4 @@ return [
 
     ],
 
-];
+];