Disable chmod/chgrp on "backup directory is mount"

Hello.
Please make option in server config to disable chmod/chgrp for

Code:

/usr/local/ispconfig/server/lib/classes/cron.d/500-backup.inc.php 

and

Code:

/usr/local/ispconfig/server/lib/classes/cron.d/500-backup_mail.inc.php

for mounted remote backups... its not permited in some environments.
Regards, c3n