This matches the fix in initcpiocfg. I had to create an encrypt_hook_nokey that is a copy of encrypt_hook without the part that copies the keyfile.
Added an initramfscfg module to handle pre-configuration for the Debian update-initramfs, such as installing hooks (needed for luks/FDE support on Debian-based distros). Closes #254. (Cherry-picked from the pull request.)