- New media handling system, new important settings, refer to CONFIGURE doc and web server conf
-`$config['site']['x-static-delivery']`
- You must also review the [attachments section of CONFIGURE](https://notabug.org/diogo/gnu-social/src/new_modules_system/DOCUMENTATION/SYSTEM_ADMINISTRATORS/CONFIGURE.md#attachments).
- OEmbed upgraded to Embed plugin (and now we provide Open Graph information too)
- Composer was integrated
### Functionality
- Restored broken built-in plugins
- A more powerful Plugins management tool for sysadmins
### Federation
- Added ActivityPub support
- Enabled the search box to import remote notices and profiles