Github user anmolnar commented on the issue:
https://github.com/apache/zookeeper/pull/410
@fr0stbyte Reading some Stackoverflow about the flag
(https://stackoverflow.com/questions/22304631/what-is-the-purpose-to-set-sock-cloexec-flag-with-accept4-same-as-o-cloexec),
the change looks reasonable to me. However it would be beneficial to shed some
light on how it's related to your scenario.---
