Added Option to disable Cache. Debugging made easy.

system/includes/functions.php

@@ -1625,6 +1625,8 @@ EOF;
 
 // File cache 
 function file_cache($request) {
+    
+    if(config('cache.off')) return;
 
     $c = str_replace('/', '#', str_replace('?', '~', $request));
     $cachefile = 'cache/page/' . $c . '.cache';