also remove tempfile for curl's stderr on error
also remove tempfile for curl's stderr on error

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