Fix sshd handlers for Debian 12.

[klemens-st]

Debian 12, Ubuntu 22 and above need to re-run systemd generators to pull the updated sshd port config.

Just changing sshd_config has no effect, sshd still listens on default port 22.

In this PR I add an additional handler for Debian that simply runs systemctl daemon-reload. This forces systemd to rerun its generators.

https://discourse.ubuntu.com/t/sshd-now-uses-socket-based-activation-ubuntu-22-10-and-later/30189/14