Add note to NEWS about query handler interface
diff --git a/NEWS.txt b/NEWS.txt
index 21bf7e7..5d7bf30 100644
--- a/NEWS.txt
+++ b/NEWS.txt
@@ -51,6 +51,16 @@
'sstableloader' tool. You can upgrade the file format of your snapshots
using the provided 'sstableupgrade' tool.
+4.1.6
+=====
+
+Upgrading
+---------
+ - Note that the QueryHandler interface has been changed to accomodate
+ improved management of pending requests; any custom implementations
+ (using the cassandra.custom_query_handler_class system property) will
+ need to be recompiled. For further details, see CASSANDRA-19534.
+
4.1.3
=====
