Consolidate empty password and $factory$ hash extraction to a common
function called before set_pasword(). The purpose is to ensure all
error handling and log messages are in the same place, except for
missing factory-password-hash, which is now treated as a PANIC and
logged to /dev/console.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Joachim Wiberg
39e4935369