It's not clear how Gabble should manage the following scenario:
- Alice offers a tube to Bob
- Bob disconnects without properly close the tube
It would be good for Gabble to close it to avoid to let old tubes alive during the whole lifetime of the connection. But closing tubes when contact disconnects will break tubes if the contact was actually setting his presence to invisible.
Should we start to ping the contact when he appears to be offline?
Should we rely on the bytestream connectivity checks?
Should we distinguish offered and not offered yet tube channels?
This branch close the tube when contact appears to be offline:
*** Bug 25271 has been marked as a duplicate of this bug. ***