Device_Timeout is configured on device level in minutes, there will be
events for alive (if events from monitored deviced are triggered) or dead generated (if no event is triggered from a configured device within the Device_Timeout interval). A new "DeviceMonitor" Device is created which shows the state of all monitored devices in his readings.
This is the first "public" version, test has yet to be done (esp. performance)
For more informations try a search on the fhem google groups
git-svn-id: https://svn.fhem.de/fhem/trunk@2021 2b470e98-0d58-463d-a4d8-8e2adae1ed80
