limit_conn is dropping valid connections and causing memory leaks on nginx reload

[Dejan Grofelnik Pelzel]

So upon further investigation, I noticed that changing it the zone name to
"v$binary_remote_addr" actually breaks nginx and prevents configuration
being reloaded at all even though the reload is going through successfully
until the next restart, and after that, it begins dropping the connections
again on reload.

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,276633,276636#msg-276636