Remove some includes of private.h
Add some methods to get the mempool of client and context so that we can
remove direct access.
Move some things around.
Use methods to get pw_loop variables.
See #3243
Let the driver keep announcing.
Keep track of when a message was received in the driver. If we don't
receive anything for a while, reconnect.
Don't connect twide in the manager.
The module advertizes itself on multicast and will trigger a new client
in the netjack2 manager. Tested with jack2 and 'jack_load netmanager'.
The driver will receive and send data (no midi yet) from and to the
manager in sync with the manager, without resampling and with a fixed
latency.