Added subject_mod value (set to true).

ctrl/listserver.ini

@@ -36,6 +36,8 @@ disabled = true
 	disabled = false
 	; Is this list currently closed to new subscriptions?
 	closed = false
+	; Prepend "[list-name] " to Subject of exported messages?
+	subject_mod = true
 ; Optionally over-ride default values:
 	;address = somelist@someserver.com
 	;description = My mailing list