* Add Mercury version 1.0.1
* Remove cci and bmi dependency requirements: these are not currently
defined in Spack. If +bmi is enabled, the effect is that it may
use a system install of bmi
* Add a note that fabtests is deprecated and has been folded into the
libfabric package. Add the fabtests resource to the libfabric
package
* Add CMake option settings to Mercury based on variant settings
* Mercury: Set OFI testing protocol depending on how libfabric was
built
* Mercury: add version constraints to dependencies
- 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
