Config SSL via config.yaml

[abdidarmawan007]

I hope that the SSL configuration can be done via config.yaml and not hardcoded in the Golang file, for example

listeners:
  - type: "tcp"
    id: "tcp1"
    address: ":1883"
 - type: "ssl"
    id: "tcp-ssl"
    address: ":8883"
  - type: "ws"
    id: "ws1"
    address: ":1882"
  - type: "sysinfo"
    id: "stats"
    address: ":1880"
ssl:
 certfile /ssl/certs/example.com.crt
 keyfile /ssl/certs/example.com.key    
hooks:
  debug:
    enable: true
  storage:
    badger: