Move the change log of HDFS-723 from section 0.21 to section 0.20.2

git-svn-id: https://svn.apache.org/repos/asf/hadoop/hdfs/trunk@829894 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -456,8 +456,6 @@ Release 0.21.0 - Unreleased
     HDFS-725. Support the build error fix for HADOOP-6327.  (Sanjay Radia via
     szetszwo)
 
-    HDFS-723. Fix deadlock in DFSClient#DFSOutputStream. (hairong)
-
 Release 0.20.2 - Unreleased
 
   IMPROVEMENTS
@@ -479,6 +477,8 @@ Release 0.20.2 - Unreleased
     HDFS-579. Fix DfsTask to follow the semantics of 0.19, regarding non-zero
     return values as failures. (Christian Kunz via cdouglas)
 
+    HDFS-723. Fix deadlock in DFSClient#DFSOutputStream. (hairong)
+
 Release 0.20.1 - 2009-09-01
 
   IMPROVEMENTS