updating comment.

Signed-off-by: Taylor Otwell <taylorotwell@gmail.com>

application/config/session.php

@@ -38,11 +38,11 @@ return array(
 	|
 	| Some session drivers require the manual clean-up of expired sessions.
 	| This option specifies the probability of session garbage collection
-	| occuring for any given request. 
+	| occuring for any given request to the application. 
 	|
 	| For example, the default value states that garbage collection has a
 	| 2% chance of occuring for any given request to the application.
-	| Feel free to tune this to your application's size and speed.
+	| Feel free to tune this to your requirements.
 	|
 	*/