### Security
+- [DHE params deployment](https://weakdh.org/sysadmin.html).
- badusb mitigations.
- knock integration via https://github.com/juasiepo/knockd
- apache:
- cleanup hidden `/.gem`.
- use prompt.sh from bash-prompt as a submodule.
- mail:
+ - use ssl::dhparams, move to 2048 bit and use the standard file names and paths.
- schleuder: manage `/etc/schleuder/schleuder.conf`, using `superadminaddr: root` or other recipient, to avoid mails
sent as `root@localhost`.
- deploy https://git.autistici.org/ale/smtp-fp/tree/master