use 24 hours interval if the interval value (config.cache_control_interval) is set to over 1000. fixes cache control for older config.cache_control_interval values

cacheControl.js

@@ -20,8 +20,8 @@ module.exports.removeCacheFiles = function() {
   if(config.cache_control) {
     deleteStatic();
 
-    const hours = config.cache_control_interval;
-    if (hours < 1 || isNaN(hours)) {
+    let hours = config.cache_control_interval;
+    if (hours < 1 || hours > 10000 || isNaN(hours)) {
       hours = 24;
     }