HDFS-5474. Deletesnapshot can make Namenode in safemode on NN restarts. Contributed by Sathish.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541685 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5075 httpfs-config.sh calls out incorrect env script name

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541692 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5624 Move grizzly-test and junit dependencies to test scope

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541702 13f79535-47bb-0310-9956-ffa450edef68
Move HDFS-5325 and HDFS-5488 from BUG-FIX to IMPROVEMENT in CHANGES.txt.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541718 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10078. KerberosAuthenticator always does SPNEGO. (rkanter via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541720 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9956. RPC listener inefficiently assigns connections to readers (daryn)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541736 13f79535-47bb-0310-9956-ffa450edef68
Move HADOOP-9956 to correct release in CHANGES.txt


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541740 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10095. In CodecPool, synchronize pool and codecList separately in order to reduce lock contention.  Contributed by Nicolas Liochon


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541750 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5444. Choose default web UI based on browser capabilities. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541753 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