Summary:
related to T13566
- mqtt_client has a new keep_alive(seconds) function
- keep_alive(0) disables ping
- if keep_alive() is not called, the client assumes keep_alive=10
- the client respects server_keep_alive if sent by the broker
Reviewers: ivica
Reviewed By: ivica
Subscribers: miljen, iljazovic
Differential Revision: https://repo.mireo.local/D27557