[DBTech] DragonByte Optimise 3.4.2

Feature: Flushing the Redis cache (or using the Test feature) now only flushes DB #0 as opposed to the entire Redis cache
Change: Changed the internal product URL and the copyright footer to match DBTech's new XenForo 2 site

Fix: Threadloom search results has been added to the exclusion list for the Guest Full Page Cache feature

Feature: Slow Query Log - queries above your specified execution time will appear in the Server Error Log
Change: Improved the performance of the Filesystem cacher - can now partially flush the cache
Change: Improved the performance of the XCache cacher - can now partially flush the cache
Change: Improved the performance of the Memcache cacher - can now partially flush the cache
Change: Improved the way the Branding Free system works, no longer requires a separate key
Fix: The Lost Password pages are no longer subject to Guest Full Page Caching

Change: Further improved the error log for Redis servers

Change: A server error log is now added should the cacher fail and revert to the "None" operator
Fix: Potential workaround for issues where manually inserted JS / CSS files would not be deferred or cached correctly

Fix: In certain scenarios, a server error could occur when using the "Post Rating" mod in conjunction with DB Optimise
Fix: In certain scenarios, the login page could be cached incorrectly

Fix: In certain scenarios, AdminCP pages could be cached by the Full Page Cache feature

Feature: Guest Full Page Caching
Feature: Who’s Online caching
Feature: Each cache type can now have its own individual TTL setting
Change: Certain cache operators can now flush individual forum/thread/post caches

Feature: Support for <link rel="preload"> tags for CSS

Change: Added "stripe" to the default "Defer JavaScript" blacklist to resolve issues with [bd] Paygates