FIX: Unknown command causes a crash


git-svn-id: https://fhem.svn.sourceforge.net/svnroot/fhem/trunk/fhem@3003 2b470e98-0d58-463d-a4d8-8e2adae1ed80
Setting STATE to Defined, ??? is misleading for a working device.


git-svn-id: https://fhem.svn.sourceforge.net/svnroot/fhem/trunk/fhem@3004 2b470e98-0d58-463d-a4d8-8e2adae1ed80
Fixing faq 21


git-svn-id: https://fhem.svn.sourceforge.net/svnroot/fhem/trunk/fhem@3005 2b470e98-0d58-463d-a4d8-8e2adae1ed80
correct ack for virtual channels

git-svn-id: https://fhem.svn.sourceforge.net/svnroot/fhem/trunk/fhem@3006 2b470e98-0d58-463d-a4d8-8e2adae1ed80
fix uninitialized value error if remote device ist not present


git-svn-id: https://fhem.svn.sourceforge.net/svnroot/fhem/trunk/fhem@3007 2b470e98-0d58-463d-a4d8-8e2adae1ed80