[ci skip] Update codeigniter.com links to https
diff --git a/application/config/config.php b/application/config/config.php
index 4f8f814..23ef5a5 100644
--- a/application/config/config.php
+++ b/application/config/config.php
@@ -62,7 +62,7 @@
 | This option allows you to add a suffix to all URLs generated by CodeIgniter.
 | For more information please see the user guide:
 |
-| http://codeigniter.com/user_guide/general/urls.html
+| https://codeigniter.com/user_guide/general/urls.html
 */
 $config['url_suffix'] = '';
 
@@ -110,8 +110,8 @@
 | This item allows you to set the filename/classname prefix when extending
 | native libraries.  For more information please see the user guide:
 |
-| http://codeigniter.com/user_guide/general/core_classes.html
-| http://codeigniter.com/user_guide/general/creating_libraries.html
+| https://codeigniter.com/user_guide/general/core_classes.html
+| https://codeigniter.com/user_guide/general/creating_libraries.html
 |
 */
 $config['subclass_prefix'] = 'MY_';
@@ -311,7 +311,7 @@
 | If you use the Encryption class, you must set an encryption key.
 | See the user guide for more info.
 |
-| http://codeigniter.com/user_guide/libraries/encryption.html
+| https://codeigniter.com/user_guide/libraries/encryption.html
 |
 */
 $config['encryption_key'] = '';