Persistent client disconnect on SIGHUP only?

[rapli]

I am running Mosquitto 2.0.9 and 2.0.11 on Ubuntu 20.04 with persistent_client_expiration set to 3d and just noticed that persistent clients seem to be disconnected only on SIGHUP / service reload. Assuming that this is the intended behaviour instead of disconnecting clients automatically when they have not reconnected in the time range defined by persistent_client_expiration, I think it could be useful to mention this in the documentation in order to prevent wrong expectations.

[ralight]

The intention with persistent_client_expiration is to be able to remove clients that connected with clean session set to false and are not currently connected. If the client then doesn't reconnect within the configured time period, the session will be removed from the broker.

I can see how the documentation isn't clear and how what you suggest could be taken as the meaning.