Create branch HDFS-4685 for development of HDFS ACLs.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1547224 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4685. Add CHANGES-HDFS-4685.txt.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1547590 13f79535-47bb-0310-9956-ffa450edef68
Merge trunk to HDFS-4685.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1548386 13f79535-47bb-0310-9956-ffa450edef68
Merge trunk to HDFS-4685.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1549699 13f79535-47bb-0310-9956-ffa450edef68
Merge trunk to HDFS-4685.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1549906 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5594. FileSystem API for ACLs. Contributed by Chris Nauroth.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1549910 13f79535-47bb-0310-9956-ffa450edef68
Create a branch for HDFS-5535 Rolling upgrade improvement.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-5535@1550130 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5650. Remove AclReadFlag and AclWriteFlag in FileSystem API. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1550256 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5596. Implement RPC stubs. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1550544 13f79535-47bb-0310-9956-ffa450edef68
Merge trunk to HDFS-4685.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1550774 13f79535-47bb-0310-9956-ffa450edef68
Merge trunk to HDFS-4685.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1551332 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5496. Make replication queue initialization asynchronous. Contributed by Vinay.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-5535@1552109 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5685. Implement ACL as a INode feature. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1552465 13f79535-47bb-0310-9956-ffa450edef68
Merge trunk to HDFS-4685.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1552467 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5618. NameNode: persist ACLs in fsimage. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1553221 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5619. NameNode: record ACL modifications to edit log. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1553224 13f79535-47bb-0310-9956-ffa450edef68
Merge trunk to HDFS-4685.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1553226 13f79535-47bb-0310-9956-ffa450edef68
Update CHANGES-HDFS-4685.txt for several issues that have been converted to Hadoop Common sub-tasks of HADOOP-10184.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1553602 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10187. add getfacl and setfacl with minimal support for getting and setting ACLs. Contributed by Vinay.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1553735 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10192. FileSystem#getAclStatus has incorrect JavaDocs. Contributed by Chris Nauroth.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1553737 13f79535-47bb-0310-9956-ffa450edef68