A couple of general improvements related to slim pollers, summary below, see individual commits for details
Add containerhealth mon command, to avoid shipping it directly in container images
Adjust restart.sh so it works on systems without systemd, avoiding the need to patch it in container images
Sync encryption keys to peers when registering a slim poller, ensuring Naemon can start correctly (it worked before due to systemd restarting Naemon down the line when the slim poller pushed its encryption keys)
A couple of general improvements related to slim pollers, summary below, see individual commits for details