Document PR #232: Master try w res and more.
diff --git a/RELEASE_NOTES.txt b/RELEASE_NOTES.txt
index 1f1108a..e29a4b9 100644
--- a/RELEASE_NOTES.txt
+++ b/RELEASE_NOTES.txt
@@ -1,3 +1,27 @@
+Release 5.2 BETA1
+------------------
+
+This is the second BETA release in the 5.1 release series that includes a number of
+new features as well performance optimizations in the classic HTTP transport.
+
+Notable changes and features included in the 5.1 series:
+
+* ...
+
+Change Log
+-------------------
+
+* PR #232: Master try w res and more.
+ - Use try-with-resources.
+ - Use diamonds.
+ - Add missing @Override.
+ - Make better use of Map APIs.
+ - Remove redundant modifiers. …
+ - Use Collections.addAll() API instead of loops.
+ - Remote extra semicolons (;).
+ Contributed by Gary Gregory <garydgregory at gmail.com>
+
+
Release 5.1 BETA1
------------------
