Clustering support

[vicary]

I am looking into the possibility to replace my saturated mosquitto server with a network of brokers under the same overlay network using dynamic discovery.

Since I don't see any documentations about clustering, just want to know if there is any plans or thoughts about this.

I may have to make this work in the near future, so if PR is welcomed I could share my works here instead of my own fork.

[Chrislevi]

Is there any progress with this?