| ⇢ | A | PreferLanguageMiddleware added | |
| ⇢ | A | ProblemFinder added |
| ⇢ | B | PreferLanguageMiddleware::handle() added | |
| ⇢ | A | ProblemFinder::findInconnectableNodes() added | |
| ⇢ | A | ProblemFinder::find() added | |
| ⇢ | A | DedicatedServersRepository::find() added | |
| ⇢ | A | ProblemFinder::__construct() added | |
| ⇢ | A | ProblemFinder::findMissedExtensions() added | |
| ⇢ | A | AdminMiddleware::__construct() added |