ZOOKEEPER-1417. investigate differences in client last zxid handling btw c and java clients (thawan via camille)

git-svn-id: https://svn.apache.org/repos/asf/zookeeper/trunk@1490358 13f79535-47bb-0310-9956-ffa450edef68
ZOOKEEPER-1714 perl client segfaults if ZOO_READ_ACL_UNSAFE constant is used
  (Botond Hejj via camille)

git-svn-id: https://svn.apache.org/repos/asf/zookeeper/trunk@1495522 13f79535-47bb-0310-9956-ffa450edef68
Merge pull request #1 from apache/trunk

sync with upstream