watchdog timeout configuration
Make the watchdog timeout configurable. The watchdog device must
support the configured value, and all hosts must use the same value.
The io_timeout should usually be configured by a similar factor.
Set watchdog_fire_timeout and io_timeout in sanlock.conf, e.g.
watchdog_fire_timeout=30
io_timeout=5
The defaults remain watchdog_fire_timeout 60 and io_timeout 10.
wdmd --trytimeout <sec> can be used test if the watchdog device
supports a certain timeout value.