Whith this feature, it's now possible to disable an entire queue (and not only one queue machine), with
```sh
quman d main.q --disable-tag admin.graffy.bug4242 --reason 'preparing cluster to shutdown for power shortage, see bug 4242'
```
- also replaced the term queue name with queue machine for clarity, now that we have both QueueMachineId and QueueId
work related to [https://bugzilla.ipr.univ-rennes.fr/show_bug.cgi?id=3093]
- fixed bug in request_queue_activation, which caused it to always enable the queue, even if there are other disables
- added a synchronization mechanism to quman which patches the database to ensure the database is coherent with the current activation of the queues
work related to [https://bugzilla.ipr.univ-rennes.fr/show_bug.cgi?id=3093]
Guillaume Raffy