Fix session configs. Closes #1943.

app/config/testing/session.php

@@ -8,10 +8,10 @@ return array(
 	|--------------------------------------------------------------------------
 	|
 	| This option controls the default session "driver" that will be used on
-	| requets. By default, we will use the light-weight cookie driver but
+	| requests. By default, we will use the lightweight native driver but
 	| you may specify any of the other wonderful drivers provided here.
 	|
-	| Supported: "cookie", file", "database", "apc",
+	| Supported: "native", "cookie", "database", "apc",
 	|            "memcached", "redis", "array"
 	|
 	*/