- 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 variants and conflicts for curl * darwinssl - Apple's SSL/TLS implementation * libssh - use libssh implementation * add darwin conflict for libssh{,2} * add linux conflict for darwinssl * remove openssl when +darwinssl * Update package.py * Update package.py * Update package.py * Update package.py