Bug#995986: simple-cdd: Firmware not being included in installer image

[R.Penney]

I can confirm that this issue still seems to affect simple-cdd 0.6.9 on 
bookworm as of mid-May 2023 (including debian-cd version 3.2.1).

I too have tried 'export FORCE_FIRMWARE=1' together with 'export 
NONFREE_COMPONENTS="non-free non-free-firmware"', 
'mirror_components="main non-free non-free-firmware"' and various 
combinations thereof within my profile.default, all without success.

It would be great to see a working example of how to get firmware 
packages managed by simple-cdd. Thanks.