maintenance reminder: 30 minute warning

[Christer Edwards <christer edwards gmail com>]

Reminder - I will be rebooting two machines in the Canonical data
center (progress and socket) in ~30min. I don't anticipate any issues
as these both have a good track record of coming back online properly.
Please wrap up anything you might be doing on these machines. To be
conservative, please allow 1hr before diving back into work.

Thank you,
Christer