lets just clear everything

Signed-off-by: Mattias Andrée <maandree@operamail.com>
acquire encrypted passphrase from shadow with fallback to passwd and do some checks

Signed-off-by: Mattias Andrée <maandree@operamail.com>
check that we are in a tty

Signed-off-by: Mattias Andrée <maandree@operamail.com>
doc

Signed-off-by: Mattias Andrée <maandree@operamail.com>
drop privileges when we have the encrypted passphrase

Signed-off-by: Mattias Andrée <maandree@operamail.com>
m + stop reading at enter

Signed-off-by: Mattias Andrée <maandree@operamail.com>
misc

Signed-off-by: Mattias Andrée <maandree@operamail.com>
do passphrase verification

Signed-off-by: Mattias Andrée <maandree@operamail.com>