Switch to thte same approach as used in suse:
-Try to unseal any persistent handles
-If that works, try to use it on network
-If it didn't work, clear that handle
-When an api key is retrieved, then seal it to pcr 15
-When it's all done, extend pcr15 to prevent the OS from being able to
unseal
When going to zram, things were solid for space reduction as
data was written, however memory could no longer be reclaimed.
It turns out that zram supports TRIM, and by telling xfs discard,
we have it do trim-on-demand. It is by default off out of performance
concerns, but I don't think that applies to a zram backed filesystem.
