[TASK] NEWS.txt entry for EXT:beuser refactoring

Change-Id: I4e4747ceb4470bec97e640b1c36d8da7df922722
Resolves: #39670
Releases: 6.0
Reviewed-on: http://review.typo3.org/13553
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn

NEWS.txt

@@ -174,7 +174,13 @@ Security
 Backend
 -------------------------------------------------------------------------------
 
-...
+* New backend user administration module
+
+The backend user administration module was created from scratch again. The
+interface changed a lot, it is now possible to filter large groups of users
+with certain criteria and to compare specific user information. The code was
+made more flexible to easily cope with different use cases and to be more
+open for future enhancements.
 
 htmlArea RTE
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