XF2 Addons Redis Cache By Xon 2.15.4

This add-on uses Credis with a custom cache provider for Redis

• Fix helper code to expire/purge Redis keys did not support non-main cache backends.
  • If using a separate caching backend for CSS, old styling was not actively expired as expected, resulting in higher memory usage
  • If 3rd party code uses expireCacheByPattern/purgeCacheByPattern function, the new nullable 'cache' parameter should be used