MQTT certificate and the key supporting

I proposed the pull-request first, I’m sorry to invert the order of the process.

I want to use the loraserver application on the AWS IoT. AWS IoT’s MQTT broker requires MQTT certificate and the key, so I hope the loraserver system support that.
Ref: https://docs.aws.amazon.com/iot/latest/developerguide/x509-certs.html

I think that there is demand for also other systems, not only for AWS IoT.

How about this?

I did see your pull-request, thanks for that! Please give me some time to review and merge it :wink:

Thank you for your reply. I’m glad to hear that.