HDFS-7218. FSNamesystem ACL operations should write to audit log on failure. (clamb via yliu)
HADOOP-11271. Use Time.monotonicNow() in Shell.java instead of Time.now() (Contributed by Vinayakumar B)
HADOOP-11265. Credential and Key Shell Commands not available on Windows. Contributed by Larry McCay.
Merge branch 'apache-trunk' into HDFS-7359
HDFS-7359: Improve logging when SecondaryNameNode principal not used.