HttpUtils: "POST data as hash" patch from justme1968


git-svn-id: svn://svn.code.sf.net/p/fhem/code@4909 2b470e98-0d58-463d-a4d8-8e2adae1ed80
FHEMWEB: FW_visibleDevices from justme1968


git-svn-id: svn://svn.code.sf.net/p/fhem/code@4910 2b470e98-0d58-463d-a4d8-8e2adae1ed80