ZOOKEEPER-1634: hardening security by teaching server to enforce client authentication

[Guilherme Ramos]

Hello.
As requested by Enrico Olivelli, I'm trying to use  Zookeeper to 3.6.1
using SASL, jaas(with Server defined) and still accepting client
connections without credentials.

What can be done here? Is there a roadmap to fix this?

Thank you.