Add tool for requesting & handling offline signatures
Add tool for requesting & handling offline signatures

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