HDFS-5375. hdfs.cmd does not expose several snapshot commands. Contributed by Chris Nauroth.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1533165 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5379. Update links to datanode information in dfshealth.html. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1533181 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5336. DataNode should not output StartupProgress metrics. Contributed by Akira Ajisaka.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1533183 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10055. FileSystemShell.apt.vm doc has typo "numRepicas". Contributed by Akira Ajisaka.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1533188 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-xxx-hadoop-auth-kerberos-realm-trunk-gd