Init script return pretty quickly after launch, so we cannot use that to
detect if they, or the daemon they launched, have crashed. So we start
the service_retry() with a 2 sec delay, which should be ample time to
allow the pidfile plugin to detect a forking service's new PID.
In release-cycle regression, no public issue needed.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>