Add 'cache_query_string' configuration option
Close #2349
diff --git a/application/config/config.php b/application/config/config.php
index fc4547b..4ee3335 100644
--- a/application/config/config.php
+++ b/application/config/config.php
@@ -322,6 +322,17 @@
/*
|--------------------------------------------------------------------------
+| Cache Include Query String
+|--------------------------------------------------------------------------
+|
+| Set this to TRUE if you want to use different cache files depending on the
+| URL query string. Please be aware this might result in numerous cache files.
+|
+*/
+$config['cache_query_string'] = FALSE;
+
+/*
+|--------------------------------------------------------------------------
| Encryption Key
|--------------------------------------------------------------------------
|