Send backlog when secondary clients connect
An option to send X lines of backlog when a client connects while other clients are already connected.
Assume I am connected to my bip proxy with client 1 (a desktop computer).
When I leave my home, I leave client 1 running and later connect with client 2 (a mobile device).
Client 2 never gets the messages that client 1 recieved in the meantime.
A similar option would be to send backlog to client 2 starting from the moment client 1 was set to away. This could be more or less useful, depending on usage.