Highlights
Optimize for Push Application, 500K+ Subscribers to a Topic.
Optimization for Route ETS insertion (#427)
Priority Message Queue for Persistent Session (#432)
Add Redis, MongoDB Plugins (#417)
Enhancements
Username/Password Authentication: Support to configure default users (#428)
Improve CLI Commands: pubsub, bridges, trace (#429)
emqttd_mod_subscription: fix client_connected/3
emqttd_auth_mod: add passwd_hash/2 function
priority_queue: add plen/2, out/2 functions
BugFix
Fix dequeue/1 of emqttd_bridge
Add emqttd:seed_now/0 function
Plugins
emqttd_plubin_mysql: Changed mysql driver to mysql-otp
emqttd_plugin_pgsql: Integrate with ecpool
emqttd_plugin_redis: First release
emqttd_plugin_mongo: First release