Revert "Remove references to --manual and --webroot"
Revert "Remove references to --manual and --webroot"

This reverts commit 02562c75a3688c1cebdc0567bbc381440cc7f204.

lbeltrame/letsencrypt,brentdax/letsencrypt,Sveder/letsencrypt,wteiken/letsencrypt,bsmr-misc-forks/letsencrypt,stweil/letsencrypt,sjerdo/letsencrypt,sjerdo/letsencrypt,wteiken/letsencrypt,twstrike/le_for_patching,kuba/letsencrypt,thanatos/lets-encrypt-preview,thanatos/lets-encrypt-preview,TheBoegl/letsencrypt,jtl999/certbot,lmcro/letsencrypt,TheBoegl/letsencrypt,kuba/letsencrypt,letsencrypt/letsencrypt,lmcro/letsencrypt,bsmr-misc-forks/letsencrypt,piru/letsencrypt,xgin/letsencrypt,jtl999/certbot,mrb/letsencrypt,VladimirTyrin/letsencrypt,DavidGarciaCat/letsencrypt,mitnk/letsencrypt,mitnk/letsencrypt,martindale/letsencrypt,Sveder/letsencrypt,martindale/letsencrypt,piru/letsencrypt,twstrike/le_for_patching,mrb/letsencrypt,dietsche/letsencrypt,jsha/letsencrypt,xgin/letsencrypt,lbeltrame/letsencrypt,stweil/letsencrypt,DavidGarciaCat/letsencrypt,VladimirTyrin/letsencrypt,goofwear/letsencrypt,jsha/letsencrypt,brentdax/letsencrypt,dietsche/letsencrypt,goofwear/letsencrypt,letsencrypt/letsencrypt