MAPREDUCE-5038. old API CombineFileInputFormat missing fixes that are in new API. (sandyr via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1@1454129 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5049. CombineFileInputFormat counts all compressed files non-splitable. (sandyr via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1@1454137 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9369. DNS#reverseDns() can return hostname with . appended at the end. Contributed by Karthik Kambatla.


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