Issue #2566925 by helmo: Update fast_404 comment in default.settings.php

sites/default/default.settings.php

@@ -609,16 +609,16 @@
  *
  * The options below return a simple, fast 404 page for URLs matching a
  * specific pattern:
- * - $conf['system.performance']['fast_404']['exclude_paths']: A regular
+ * - $config['system.performance']['fast_404']['exclude_paths']: A regular
  *   expression to match paths to exclude, such as images generated by image
  *   styles, or dynamically-resized images. The default pattern provided below
  *   also excludes the private file system. If you need to add more paths, you
  *   can add '|path' to the expression.
- * - $conf['system.performance']['fast_404']['paths']: A regular expression to
+ * - $config['system.performance']['fast_404']['paths']: A regular expression to
  *   match paths that should return a simple 404 page, rather than the fully
  *   themed 404 page. If you don't have any aliases ending in htm or html you
  *   can add '|s?html?' to the expression.
- * - $conf['system.performance']['fast_404']['html']: The html to return for
+ * - $config['system.performance']['fast_404']['html']: The html to return for
  *   simple 404 pages.
  *
  * Remove the leading hash signs if you would like to alter this functionality.