Merge pull request #2129 from darixsamani/rmqtt

Add rmqtt to Message Queue Section and Sort Alphabetically

Author: palfrey

README.md

@@ -407,6 +407,7 @@ See also [Games Made With Piston](https://github.com/PistonDevelopers/piston/wik
 
 ### Message Queue
 
+* [Rmqtt](https://github.com/rmqtt/rmqtt) - MQTT Server/MQTT Broker — Scalable distributed MQTT message broker for IoT in the 5G era.
 * [RobustMQ](https://github.com/robustmq/robustmq) - Next generation cloud-native converged message queue.
 * [Rocketmq-Rust](https://github.com/mxsm/rocketmq-rust) - 🚀Apache RocketMQ build in Rust🦀. Faster, safer, and with lower memory usage.