add test coverage to nonetype http01_port
add test coverage to nonetype http01_port

wteiken/letsencrypt,bsmr-misc-forks/letsencrypt,thanatos/lets-encrypt-preview,stweil/letsencrypt,lmcro/letsencrypt,stweil/letsencrypt,brentdax/letsencrypt,dietsche/letsencrypt,jtl999/certbot,jsha/letsencrypt,dietsche/letsencrypt,bsmr-misc-forks/letsencrypt,letsencrypt/letsencrypt,letsencrypt/letsencrypt,thanatos/lets-encrypt-preview,lmcro/letsencrypt,DavidGarciaCat/letsencrypt,wteiken/letsencrypt,mitnk/letsencrypt,jsha/letsencrypt,brentdax/letsencrypt,mitnk/letsencrypt,DavidGarciaCat/letsencrypt,jtl999/certbot