W3 Total Cache Pro 2.8.8

* Fix: Correct interpolation of a symlinked cache directory
* Fix: Memcached test using SASL authentication
* Fix: Multi-site authorization request returning to incorrect URL

Fix: PHP 8 compatibility: Invalid return type if Browser Cache is disabled
Fix: Added AWS SNS message classes (aws/aws-php-sns-message-validator)
Fix: PageSpeed service: messages and escaping
Fix: Image Service meta query handling
Update: Dependency version updates
Update: Content-Security-Policy (CSP) and Content-Security-Policy-Report-Only (CSPRO) header field configuration

Feature: PageSpeed Insights reports and performance page widget
Feature: Added basic OpenLiteSpeed support
Feature: Add Permissions-Policy to mirror Feature-Policy directives
Fix: PHP 8.2 compatibility
Fix: GuzzleHttp 7 conflict with Azure
Fix: Allow object cache updates when using WP-CLI
Fix: Added missing Page Cache configuration “host” value
Fix: Missing on_comment_status action callback
Fix: Flush cache on attachment update
Fix: Varnish flush for posts
Update: Improved comment status logic for flushing database and object caches
Update: Adjusted FTP form style
Update: Removed deprecated MaxCDN and NetDNA components and added a notice if one was used
Update: Removed deprecated FeedBurner