No letsencrypt renewals scripts for onion only installs

src/freedombone

 
 # script to automatically renew any Let's Encrypt certificates
 function letsencrypt_renewals {
+    if [[ $ONION_ONLY != "no" ]]; then
+        return
+    fi
+
     renewals_script=/etc/cron.monthly/letsencrypt
     renewals_retry_script=/etc/cron.daily/letsencrypt
     renewal_failure_msg=$'The certificate for $LETSENCRYPT_DOMAIN could not be renewed'