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