change openssl to use enddate for expiry date check

letsencrypt.sh

@@ -221,8 +221,8 @@ fi
     echo -n "Found existing cert for ${domain}. Expire date ..."
     set +e; openssl x509 -checkend $((${RENEW_DAYS} * 86400)) -noout -in "certs/${domain}/cert.pem"; expiring=$?; set -e
     if [[ ${expiring} -eq 0 ]]; then
-	valid=$(openssl x509 -text -noout -in "certs/${domain}/cert.pem" | grep -i "not after"  | cut -d: -f2- )
-	echo "${valid} Skipping. (Valid longer than ${RENEW_DAYS} days.)"
+	valid=$(openssl x509 -enddate -noout -in "certs/${domain}/cert.pem" | cut -d= -f2- )
+	echo " ${valid} Skipping. (Valid longer than ${RENEW_DAYS} days.)"
         continue
     fi
     echo " is within ${RENEW_DAYS} days. Renewing..."