I noticed on this page: http://zookeeper.apache.org/doc/r3.3.3/zookeeperAdmin.html
that FreeBSD was listed as being supported only as a client due to a problem with the JVM on FreeBSD.
As of Friday zookeeper is fully supported on FreeBSD, using openjdk version 7
and I have created a port for it in our ports collection:
The zookeeper port tracks the stable release at the moment and in the near future to track the current release, as the plain zookeeper port tracks the stable.
Please update your documentation to reflect this change in support.