Update changes for HADOOP-9832.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1510796 13f79535-47bb-0310-9956-ffa450edef68

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -370,6 +370,8 @@ Release 2.1.0-beta - 2013-08-06
 
     HADOOP-9698. [RPC v9] Client must honor server's SASL negotiate response (daryn)
 
+    HADOOP-9832. [RPC v9] Add RPC header to client ping (daryn)
+
   NEW FEATURES
 
     HADOOP-9283. Add support for running the Hadoop client on AIX. (atm)