build:
  - add variables: cleanup (build.sh), debug_cache (update.sh)
  - /etc/mdev.conf: /dev/(null|zero|full|u?random) mode 666 (a=rw) fixes
    installer apt failure
  - output repo name for selected packages (update.sh)

installer:
  - release: bookworm replaces bullseye
  - Debian Bookworm package changes: ntpsec replaces ntp, sysvinit-utils
    replaces lsb-base, systemd-resolved/systemd-timesyncd become presets
  - network time sync: remove ntpdate (python dep.), update rdate servers,
    http fallback: new http-date method replaces defunct method
  - add cdebootstrap_debug variable
  - resolve apt warnings, deprecated apt-key: install main repo gpg keys to
    /etc/apt/trusted.gpg.d/

doc:
  - preset packages reflect Debian Bookworm convention
  - add cdebootstrap_debug advanced install parameter