fix pubMod64 and thumbprint calculation
fix pubMod64 and thumbprint calculation

We must strip the trailing newline with `echo -n` before we pass it to
perl to convert the hex to binary, not after.

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