anchor.diff:  f_rootaccess
   f_package_remove
   f_package_install
  +f_coredump
   f_usbguard
   f_postfix
   f_apport
  
positive.code: f_logindconf
  f_journalctl
  f_timesyncd
  f_coredump
  f_fstab
  f_prelink
  f_aptget_configure
  
negative.code: Disable coredumps with `systemd/coredump.conf`.
  
  ==== 38_postfix
  Disable the `VRFY` command, configure `smtpd_banner`, `smtpd_client_restrictions`
  and `inet_interfaces`.
  
  ==== 39_motdnews
  Disable `motd-news`.
  