HADOOP-9816. RPC Sasl QOP is broken (daryn)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1510772 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4905. Add appendToFile command to "hdfs dfs". Contributed by Arpit Agarwal.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1510773 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9832. Add RPC header to client ping (daryn)



git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1510793 13f79535-47bb-0310-9956-ffa450edef68