The certificate renewed but nginx didn't get reloaded by the post-hook for some reason
Post-mortem: The certbot package defined a systemd timer and a /etc/cron.d/ entry for renewal, so my own crontab entry that defined a post-hook never got to do the renewing
@Gargron put it down to a systemd issue and no one will doubt it :)
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@Keltounet @Gargron more like problem exists between systemd and chair... hue hue hue...
