Change the default value of the "checker" option command to make the checker command be run-time dependent on the "host" client attribute instead of reading it only once on startup:
* clients.conf (checker): Changed default commented-out value to "fping -q -- %%(host)s". * mandos (main): Changed default value for the "checker" config option to "fping -q -- %%(host)s". * mandos-clients.conf.xml (OPTIONS): Document changed default value. (EXAMPLE): Changed value of "checker".