By making lbmk fully POSIX-compliant, it will be easier to port lbmk to
other systems implementing POSIX such as Alpine Linux and FreeBSD.

Signed-off-by: Ferass 'Vitali64' EL HAFIDI <vitali64pmemail@protonmail.com>

osboot is now part of libreboot, and will soon shut down.
libreboot now conforms to osboot policy.

Keeping the git repositories is useful while development, e.g. to avoid
git cloning repositories over and over again while debugging download
scripts. Setting the NODELETE environment variable keeps the blobs and
the git repositories. Allow a slightly finer-tuned version of this where
we can keep only the git-related files by setting the variable to "git".

Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>

this is cherry-picked from osbmk. the cherry-pick was
performed by i, leah rowe. this is adapted from shmalebx's
patch there, in osboot

specifically, these patches from osbmk are being imported:

327a39ef058d5385bf8c1a1b09bac8db6a51b016

5139ad4be4df1835ce154f39161eef4f7c31ee1a

This doesn't change the existing usage of the scripts:
- For the Coreboot script, before this change, all arguments that were
  passed were considered as board to download the Coreboot source code
  for.

  Here we added the '--help' and '--list-boards' arguments, so it
  should not be an issue as it is extremely unlikely that a board
  would be called '--help' or '--list-boards'.

- All the other scripts don't use any arguments so passing --help
  should not conflict with the existing usage.

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>

this is forked from the "libre" branch in osboot, which is itself a libre,
deblobbed fork of osboot, a blobbed up fork of libreboot

libreboot needed to be purged clean. this is the new libreboot development
repository. the old one has been abandoned