Revert "Avoid dangerous and mysterious behaviour if someone tries to modify a config"
Revert "Avoid dangerous and mysterious behaviour if someone tries to modify a config"

This reverts commit 83afb58a9a6099ad1e3c54097c2bb509e98f38f8.

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