/etc/init.d/charybdis reload does nothing due to insecure PID file

[Malcolm Scott]

On focal, I cannot reload charybdis from the init script (or from 'service' or 'systemctl'):

$ sudo SYSTEMCTL_SKIP_REDIRECT=1 bash -x /etc/init.d/charybdis reload
(...)
+ start-stop-daemon --stop --signal 1 --quiet --pidfile /var/run/charybdis/ircd.pid
start-stop-daemon: matching only on non-root pidfile /var/run/charybdis/ircd.pid is insecure

According to start-stop-daemon(8):

   -p, -pidfile pid-file
        (...)
        Warning: using this match option with a world-writable pidfile or using it alone with a daemon that writes the pidfile as an unprivileged (non-root) user will be refused with an error (since version 1.19.3)

This can be worked around by adding an --exec match to the invocation of start-stop-daemon in do_reload() in /etc/init.d/charybdis:

        start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --exec $DAEMON