The crypto device modules should only be setting up the crypto devices and
not getting user input. This has the added benefit of simplifying the code
such that three essentially duplicate pieces of code are merged into one.
Add documentation of passphrase option for cryptomount as it is now usable.
Signed-off-by: Glenn Washburn <development@efficientek.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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