Merge pull request #1817 from drwetter/le_issuer_fix1816

Fix issuer check for Let's Encrypt

testssl.sh

@@ -9068,7 +9068,7 @@ certificate_info() {
 
      # We adjust the thresholds by %50 for LE certificates, relaxing warnings for those certificates.
      # . instead of \' because it does not break syntax highlighting in vim
-     if [[ "$issuer_CN" =~ ^Let.s\ Encrypt\ Authority ]] ; then
+     if [[ "$issuer_O" =~ ^Let.s\ Encrypt ]] ; then
           days2warn2=$((days2warn2 / 2))
           days2warn1=$((days2warn1 / 2))
      fi