heartbeat topic is in publish event

[gnought]

Caught '$SYS/' + that.id + '/heartbeat' topic on publish event, is it a design?

the packet is as follows when client is null:

 message from client  null Packet {
  cmd: 'publish',
  brokerId: 'tHMNcxXrm',
  brokerCounter: 1,
  topic: '$SYS/tHMNcxXrm/heartbeat',
  payload: <Buffer 74 48 4d 4e 63 78 58 72 6d>,
  qos: 0,
  retain: false,
  messageId: 0 }

Seems related to #7 and 9bca79c, but they do not mention what the packet is when client is null on publish event.

If it is not a design, I could submit a PR not to publish the heartbeat on the publish event.

[mcollina]

This is by design. It's a published packet, so it ends up in the publish event. client is null, because there is no client. It would be fantastic if you could update the docs.

[gnought]

Updated README.me in PR #245