util.startup: Inform process manager about failure to reload config Ref https://www.freedesktop.org/software/systemd/man/249/sd_notify.html > Note that a service that sends this notification must also send a > "READY=1" notification when it completed reloading its configuration. However no word on how to handle errors while doing that, such as configuration syntax errors, but communicating this via STATUS= makes some sense. Fixes #1970