Makefiles don't do comments, so these were forwarded into the variable.
*Most* users would expand the arguments to a shell where it'd be
ignored, but not all of them.
Contributes-To: https://github.com/RIOT-OS/RIOT/pull/18489
(This is also where the one version that is added here was removed).
Prepare for handling pkg state with files. So it requires having the
path defined before declaring targets. In addition, it cleans up the
old git-download target.
The 'BSD 3-Clause "New" or "Revised" License' is the value found by
github
3a248f649a/LICENSE
> A permissive license similar to the BSD 2-Clause License, but with a 3rd
> clause that prohibits others from using the name of the project or its
> contributors to promote derived products without written consent.
