- Retry limits?
- Server Store Limits (time, msgs, byte)
- Change time to deltas
- Server heartbeat, release dead clients.
- Require clientID for published messages, error if not registered.
- Check for need of ackMap (out of order re-delivery to queue subscribers).
- Redelivered Flag for Msg.
- Queue Subscribers
- Durable Subscribers (survive reconnect, etc)
- Start Positions on Subscribers
- Ack for delivered just Reply? No need on ConnectedResponse?
- PublishWithReply, or option.
- Data Races in Server.
- Manual Ack?