- remove the old LGPL license headers from all files in Spack
- add SPDX headers to all files
- core and most packages are (Apache-2.0 OR MIT)
- a very small number of remaining packages are LGPL-2.1-only
* Add the gnupg package and missing dependencies. Update versions of existing dependencies.
* this ended up in the wrong repo
* put versions back, remove uneeded function
* OK ;)
* autopep8
* typo on npth line
* whitespace
