It was very clear to P4 that 'partition' didn't apply to her scenario in
Mission 3 because she was trying to unlock an entire disk and not only a
partition of it.

The previous ones mentioned the tool to be used instead of the goal to
be reached by the user. These ones should be easier to navigate.

During the user testing, everybody who looked for it had a hard time
finding it or even gave up.

- Replace TrueCrypt documentation on the command line.
- Adjust LUKS documentation to explain the alternative with VeraCrypt.