Fix issue 20328: can not sync content with attribute infocollector+mandatory if its value is not filled in
update changelog
Improve the checktargets script: print status updates while executing
added a new php script: checknode, to check the status of a single node on all target feeds
Fix issue 20331: differences in node sort order are neither calculated nor displayed properly
Fix for issue 20332: ezcontentstagingevent::fetchbynode and ezcontentstagingevent::fetchbynodegroupedbytarget are broken
Improve output of checknode and checktarget scripts
Fix issue 20333: alternative text not synchronized for ezimage datatype