Fix too long cache filename

$_SERVER['REQUEST_URI'] is always url-encoded so we decoded it back before save it as a cache file.

system/includes/dispatch.php

@@ -333,7 +333,7 @@ function render($view, $locals = null, $layout = null)
 {
     $login = login();
     if (!$login) {
-        $c = str_replace('/', '#', str_replace('?', '~', $_SERVER['REQUEST_URI']));
+        $c = str_replace('/', '#', str_replace('?', '~', rawurldecode($_SERVER['REQUEST_URI'])));
         $dir = 'cache/page';
         $cachefile = $dir . '/' . $c . '.cache';
         if (is_dir($dir) === false) {

system/includes/functions.php

@@ -3040,7 +3040,7 @@ function file_cache($request)
 
     $now   = time();
 
-    $c = str_replace('/', '#', str_replace('?', '~', $request));
+    $c = str_replace('/', '#', str_replace('?', '~', rawurldecode($request)));
     $cachefile = 'cache/page/' . $c . '.cache';
     if (file_exists($cachefile)) {
         if ($now - filemtime($cachefile) >= 60 * 60 * $hour) {