pub const STATE_WATCHDOG: &str = "WATCHDOG=1";Expand description
WATCHDOG=1 — watchdog ping. Currently NOT wired into the master
event loop — the bundled os-build/systemd/sozu.service and
sozu@.service units intentionally do NOT declare WatchdogSec=,
so leaving this constant unused at link time is the documented
state. Operators who add WatchdogSec= to a custom unit will see
the unit get killed for missing pings until the periodic-timer
follow-up lands.