improvement for FWupdate - TC-IT included

git-svn-id: https://svn.code.sf.net/p/fhem/code/trunk@6291 2b470e98-0d58-463d-a4d8-8e2adae1ed80
OWX_SER: add support for network-attached serial

git-svn-id: https://svn.code.sf.net/p/fhem/code/trunk@6292 2b470e98-0d58-463d-a4d8-8e2adae1ed80
OWX_ASYNC: increase version to 5.9, unset debug-logging

git-svn-id: https://svn.code.sf.net/p/fhem/code/trunk@6293 2b470e98-0d58-463d-a4d8-8e2adae1ed80