Restart bridge and broker for update to virtualization platform

https://lists.torproject.org/pipermail/anti-censorship-team/2021-October/000196.html

We are performing an update on our virtualization platform, this requires a change in the configuration of the storage backend. Due to this update your VPS needs to be stopped/started. We will execute this for you next week.

If you prefer to plan this on your own, please feel free to stop/start your VPS yourself. By doing so, the VPS will be moved to the updated platform.

Note: A reboot from within the machine itself will not be sufficient.

We talked about this at the 2021-10-28 anti-censorship team meeting.

@dcf will do the reboots, aiming for early on 2021-10-31 UTC.