changed urlbase64 helper to also use sed for character replacements
changed urlbase64 helper to also use sed for character replacements

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