v0.5.10 added plymouth.enable=0 + rd.plymouth=0 to kernel cmdline,
but `plymouth-start.service` still registered and ran in real-root
boot. LUKS prompt remained invisible — dracut-initqueue stuck
waiting for /dev/disk/by-uuid/<luks> to materialize.
Belt-and-suspenders: mask plymouth-{start,quit,quit-wait,read-write,
switch-root}.service in the generated kickstart's %post chroot so the
units can never start.
Effect: systemd-tty-ask-password-agent handles LUKS prompt directly
on tty1 with text "Please enter passphrase for disk ...:" — sendkey-
friendly + works on real hardware too.
f588f15a6e