HADOOP-9956. RPC listener inefficiently assigns connections to readers (daryn)


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Move HADOOP-9956 to correct release in CHANGES.txt


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HADOOP-10095. In CodecPool, synchronize pool and codecList separately in order to reduce lock contention.  Contributed by Nicolas Liochon


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HDFS-5444. Choose default web UI based on browser capabilities. Contributed by Haohui Mai.

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HDFS-5504. In HA mode, OP_DELETE_SNAPSHOT is not decrementing the safemode threshold, leads to NN safemode. Contributed by Vinay.

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HDFS-5487. Introduce unit test for TokenAspect. Contributed by Haohui Mai.

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