HDFS-6112. NFS Gateway docs are incorrect for allowed hosts configuration. Contributed by Aaron T. Myers.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1579099 13f79535-47bb-0310-9956-ffa450edef68
Merge r1579104 from trunk.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1579106 13f79535-47bb-0310-9956-ffa450edef68