Github user maoling commented on the issue: https://github.com/apache/zookeeper/pull/548 - It seems that zk server side supports ipv6 style like this: `server.1=[2001:db8:1::242:ac11:2]:2888:3888`,but zk client side supports ipv6 like this:`2001:db8:1::242:ac11:2:2181`.we need unify them?[ConnectStringParser](https://github.com/apache/zookeeper/blob/master/src/java/main/org/apache/zookeeper/client/ConnectStringParser.java#L71) can reuse that method? - IMO,we should document this feature to let user know.(e.g. [here](https://github.com/apache/zookeeper/blob/master/src/docs/src/documentation/content/xdocs/zookeeperAdmin.xml#L1055))
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