commit c598423252abd6bee2f4ede5e998df61908f2605
Author: abrakadobr tano <abrakadobr@gmail.com>
Date:   Mon Jul 11 13:44:38 2016 +0200

    Boost modification for normal cache dir hook alter

diff --git a/sites/all/modules/boost/boost.module b/sites/all/modules/boost/boost.module
index 15ad887..e8ac015 100644
--- a/sites/all/modules/boost/boost.module
+++ b/sites/all/modules/boost/boost.module
@@ -503,7 +503,11 @@ function boost_transform_url($url = NULL, $b_path = NULL) {
  * Returns the relative normal cache dir. cache/normal.
  */
 function boost_get_normal_cache_dir() {
-  return variable_get('boost_root_cache_dir', BOOST_ROOT_CACHE_DIR) . '/' . variable_get('boost_normal_dir', BOOST_NORMAL_DIR);
+  $normalDir = variable_get('boost_normal_dir', BOOST_NORMAL_DIR);
+  // Give modules a chance to alter normal dir
+  // // hook_boost_get_normal_dir_alter
+  drupal_alter('boost_get_normal_dir', $normalDir);
+  return variable_get('boost_root_cache_dir', BOOST_ROOT_CACHE_DIR) . '/' . $normalDir;
 }
 
 /**