Bug 567221: Add notice about detection of lost clients

Change-Id: Iab3bc30b7bf21309660ca0081702a3bb293697c5
diff --git a/CHANGES.md b/CHANGES.md
index 8bbf684..b9bad9e 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -15,6 +15,11 @@
   * The data store interfaces RLogicalStore, RIntegerStore and RRawStore provide constants for
     special values like minimum and maximum. (Bug 568187, Bug 568190)
 
+### RServi Pool
+
+  * The pool detects "lost" clients (e.g. clients which crashed or lost the network connection to
+    the pool server) again. (Bug 567221)
+
 
 ## RJ 4.2.0 ~ StatET 4.2.0