svn merge -c -1489709 for reverting HDFS-4876.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1489875 13f79535-47bb-0310-9956-ffa450edef68
Updating release date for 0.23.8

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1489902 13f79535-47bb-0310-9956-ffa450edef68