Config file format:

<device> <mountpoint> <fs type> <encryption type> <options> <run fsck?>

where:

<device>, <mountpoint>, <fs type> are the same as in fstab

<encryption type> is one of:
- aes
- blowfish
- des
- dfc
- idea
- mars
- rc5
- rc6
- rijndael
- serpent

<options> are same as for fstab, except:
- loop= and encryption= should not be used
- for swap devices, two new options are available:
  * new -- run mkswap after losetup. Allows to change key at every mount.
  * randompass -- read encryption key from /dev/urandom. Implies "new"

<run fsck?> may be "yes" or "no"
