roles: Ensure leading zero for octal modes

roles/archweb/tasks/main.yml

roles/borg-client/tasks/main.yml

roles/borg-server/tasks/main.yml

roles/dbscripts/tasks/main.yml

roles/dovecot/tasks/main.yml

roles/nginx/tasks/main.yml

roles/opendkim/tasks/main.yml

roles/planet/tasks/main.yml

roles/postfix/tasks/main.yml

roles/postfwd/tasks/main.yml

roles/postgres/tasks/main.yml

roles/sources/tasks/main.yml

roles/spampd/tasks/main.yml