talos downtime + bonus try server downtime, Wednesday December 2nd 9am PDT

[alice nodelman]

Changes included in this downtime:

- https://bugzilla.mozilla.org/show_bug.cgi?id=530680 (create 15 linux64
talos slaves)
- https://bugzilla.mozilla.org/show_bug.cgi?id=529156 (reclone try
server repository)
- graphserver repo reset; will affect talos jobs posting to graphserver

All branches that use talos for performance testing will be affected,
along with all of try. If there is any reason not to go ahead with this
downtime as scheduled please contact me as soon as possible.

Thanks,
alice.

[alice nodelman]

I didn't provide an end time for this. We are expecting this to take no
more than 2 hours and will re-open sooner if state has returned to normal.

Thanks,
alice.