update email
Convert GpgKeyId to newtype
DigitalOcean.distroKernel property now reboots into the distribution kernel when necessary.

It might be better to do this check on boot to limit the time running the
DO kernel (which is not well security supported), but that has the
possibility of entering a bad reboot loop. Limiting this check to when
propellor runs avoids that, while still fixing the problem pretty fast.
propellor spin