Whether to generate the password files at build time and store them directly in the system closure, without requiring any services at boot time.
This is STRICTLY intended for embedded appliance images that only have system users with manually managed static user IDs, and CANNOT be used with generation updates.
WARNING: In this mode, you MUST statically manage user IDs yourself, carefully. Beware, UID reuse is a serious security issue and it's your responsibility to avoid it over the entire lifetime of the system.