Compare initial and final signals in tests.
Compare initial and final signals in tests.

bsmr-misc-forks/letsencrypt,jtl999/certbot,stweil/letsencrypt,jtl999/certbot,letsencrypt/letsencrypt,letsencrypt/letsencrypt,stweil/letsencrypt,lmcro/letsencrypt,jsha/letsencrypt,jsha/letsencrypt,bsmr-misc-forks/letsencrypt,lmcro/letsencrypt