Rework the signal handling code so that if debug is enabled and a
`SIGUSR1` signal is received, backtrace to the system log but continue
to run.
Added some basic tests for the signal handling code.
Fixes#241.
Signed-off-by: James O. D. Hunt <james.o.hunt@intel.com>
Many cli and arch files were using the 'older style' fairly full
Apache license text. The project standard is the shorter SPDX style.
Convert them over.
Fixes: #225
Signed-off-by: Graham whaley <graham.whaley@intel.com>