don't add empty vhosts
don't add empty vhosts

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