Stdout is not printed in initrd unless user invokes debug mode.
It's inconvenient to have users waiting for reencryption to
finish with no input at all.
- moddir is assigned in parent script run by dracut (warning was
silenced)
- fix defect wrt to assignement and making variable local on
same line. The variable cwd was first assigned by subshell
and later any error originating in subshell was masked by
making the variable local (which returns always 'true')
- add loop module to initramfs image
- modprobe loop before reencrypt start
- add rd.luks.reencrypt_keyslot=
- add conflict with dracut crypt module
- drop to emergency_shell after reencryption
