Backport two fixes addressing a critical failure reported by a customer:
an unclean dbus-daemon exit leaves a lingering /run/messagebus.pid, the
daemon then refuse to start, and Finit's restart loop gives up.
0001 service: clean stale pidfile after unclean daemon exit
Drop a daemon-owned (pid:!) pidfile when it still names the
just-reaped PID and that PID is no longer alive.
0002 service: log signal name and core dumps in death message
"by signal: 9" -> "killed by SIGKILL", with ", core dumped"
when applicable. Stronger breadcrumb for sudden deaths.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Joachim Wiberg
e4203b0c9e