FWupdate improve HMUsb, HMInfo checks 

git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@6391 2b470e98-0d58-463d-a4d8-8e2adae1ed80
OWX_DS9097 optimize search algorithm

git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@6392 2b470e98-0d58-463d-a4d8-8e2adae1ed80