Updated HttpAsyncClient 4.0-beta4 release notes
git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpasyncclient/trunk@1480686 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/RELEASE_NOTES.txt b/RELEASE_NOTES.txt
index b9bd1ac..4aaa469 100644
--- a/RELEASE_NOTES.txt
+++ b/RELEASE_NOTES.txt
@@ -6,6 +6,8 @@
with HttpCore 4.3 and HttpClient 4.3 APIs. Configuration and preference APIs of HttpAsyncClient
are now consistent with those used by HttpClient 4.3.
+Users of previous releases of HttpAsyncClient are advised to upgrade.
+
Changelog:
* Redesign of configuration and preference APIs.
