ZNC on chives was down Jul 04 06:38:23 through Jul 05 17:47:50

The ZNC service running on chives was stopped, apparently. journalctl --user -u znc output:

[...]
Jul 04 06:38:23 chives systemd[96506]: Stopping ZNC IRC bouncer service...
Jul 04 06:38:23 chives znc[96572]: Exiting
Jul 04 06:38:23 chives systemd[96506]: znc.service: Succeeded.
Jul 04 06:38:23 chives systemd[96506]: Stopped ZNC IRC bouncer service.
Jul 04 06:38:23 chives systemd[96506]: znc.service: Consumed 5min 8.581s CPU time.
Jul 05 17:47:50 chives systemd[654280]: Started ZNC IRC bouncer service.
Jul 05 17:47:50 chives znc[654294]: Checking for list of available modules...
Jul 05 17:47:50 chives znc[654294]: Opening config [/home/ircbouncer/.znc/configs/znc.conf]...
[...]

It seems like the service just stopped. No crash, no abnormal exit code, just stopped. I ssh'd into the machine and ran loginctl enable-linger ircbouncer and it came back up without me doing anything else. If it goes down like this again, we should consider putting enable-linger for the user in puppet.