Added redis cache driver.
diff --git a/system/libraries/Cache/Cache.php b/system/libraries/Cache/Cache.php
index 2e78a66..2555550 100644
--- a/system/libraries/Cache/Cache.php
+++ b/system/libraries/Cache/Cache.php
@@ -39,7 +39,7 @@
class CI_Cache extends CI_Driver_Library {
protected $valid_drivers = array(
- 'cache_apc', 'cache_file', 'cache_memcached', 'cache_dummy'
+ 'cache_apc', 'cache_file', 'cache_memcached', 'cache_redis', 'cache_dummy'
);
protected $_cache_path = NULL; // Path of cache files (if file-based cache)