hooks/encrypt: Provide feedback upon unlock
When unlocking a cryptdevice (LUKS, in my case) there is no feedback that unlocking succeeded, except for the lack of the "No key available with this passphrase" message (which takes some time to show, if it shows). It would be nice to have a short message acknowledging that booting can proceed, allowing the user to walk away and do other things.
My workflow is typically:
- Power on
- Enter unlock key
- Wait for the first signal encrypt succeeded
- Go get coffee.
This MR saves a second or two on 3.
Edited by Anders Wenhaug