HADOOP-10650. Add ability to specify a reverse ACL (black list) of users and groups. (Contributed by Benoy Antony)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1618482 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10335. An ip whilelist based implementation to resolve Sasl properties per connection. (Contributed by Benoy Antony)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1618484 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10335. Undo checkin to resolve test build issue.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1618487 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10335. An ip whilelist based implementation to resolve Sasl properties per connection. (Contributed by Benoy Antony)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1618503 13f79535-47bb-0310-9956-ffa450edef68