private-keys-v1.d and preserve-permissions

[Martin Pätzold]

Thanks for the clarification and the patch.

 > Is there a special reason that you need to give group access to those
 > files?

Yes, we have some period tasks that are handled by Celery. Celery has 
its own user on the system and this user needs at least read access to 
the keys, therefore we had to extend the permissions for the 
"private-keys-v1.d" directory to group access.

Regards,
Martin