Getting ready for 1.6.9 (#695)

* Getting ready for 1.6.9

* Update the changelog

readme.txt

@@ -2,7 +2,7 @@
 * Contributors: donncha, automattic, kraftbj
 * Tags: performance, caching, wp-cache, wp-super-cache, cache
 * Tested up to: 5.2.2
-* Stable tag: 1.6.8
+* Stable tag: 1.6.9
 * Requires at least: 3.1
 * Requires PHP: 5.2.4
 * License: GPLv2 or later
@@ -266,6 +266,13 @@ Your theme is probably responsive which means it resizes the page to suit whatev
 
 ## Changelog ##
 
+### 1.6.9 ###
+* Improve the variables and messaging used by advanced-cache.php code. #687
+* Add a warning message to the debug log viewer. #688
+* Disable raw viewing of the debug log. #691
+* Clean up the debug log. #692 #694
+* Added wpsc_update_check() in 9659af156344a77ae247dc582d52053d95c79b93.
+
 ### 1.6.8 ###
 * Added new constants, WPSC_SERVE_DISABLED (disable serving of cached files) and WPSC_SUPERCACHE_ONLY (only serve supercache cache files). #682 and #672
 * Hide get_post() warning on some sites. #684
@@ -729,4 +736,4 @@ Your theme is probably responsive which means it resizes the page to suit whatev
 
 
 ## Upgrade Notice ##
-Bug fixes and changes to settings page.
+Fix security issue with debug log.

wp-cache.php

@@ -3,7 +3,7 @@
 Plugin Name: WP Super Cache
 Plugin URI: https://wordpress.org/plugins/wp-super-cache/
 Description: Very fast caching plugin for WordPress.
-Version: 1.6.8
+Version: 1.6.9
 Author: Automattic
 Author URI: https://automattic.com/
 License: GPL2+