add perl shebang
add perl shebang

lukas2511/letsencrypt.sh,erdgeist/letsencrypt.sh,lukas2511/dehydrated,Rayne/letsencrypt.sh,erorus/letsencrypt.sh,Vitexus/dehydrated,erdgeist/letsencrypt.sh,ahnooie/dehydrated,dennisschuerholz/dehydrated