Merge remote-tracking branch 'origin/candidate-4.0.0' into candidate-4.0.2

Conflicts:
	version.cmake

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>

thorlcr/activities/wuidwrite/thwuidwrite.cpp

@@ -155,6 +155,7 @@ public:
     }
     void init()
     {
+        CWorkUnitWriteGlobalMasterBase::init();
         if (appendOutput)
         {
             Owned<IWorkUnit> wu = &container.queryJob().queryWorkUnit().lock();