Merge branch 'master' into next

diff --cc wcfsetup/install/files/lib/acp/form/ArticleAddForm.class.php
Simple merge

diff --cc wcfsetup/install/files/lib/acp/form/LoginForm.class.php
Simple merge

diff --cc wcfsetup/install/files/lib/data/user/UserProfile.class.php
Simple merge

diff --cc wcfsetup/install/files/lib/data/user/UserProfileAction.class.php
Simple merge

diff --cc wcfsetup/install/files/lib/data/user/avatar/DefaultAvatar.class.php
Simple merge

diff --cc wcfsetup/install/files/lib/data/user/ignore/UserIgnoreAction.class.php
Simple merge

diff --cc wcfsetup/install/files/lib/system/WCF.class.php
Simple merge

diff --cc wcfsetup/install/files/lib/system/ad/AdHandler.class.php
Simple merge

diff --cc wcfsetup/install/files/lib/system/cli/command/ImportCLICommand.class.php
Simple merge

diff --cc wcfsetup/install/files/lib/system/cronjob/CronjobScheduler.class.php
Simple merge

diff --cc wcfsetup/install/files/lib/system/html/input/HtmlInputProcessor.class.php
Simple merge

diff --cc wcfsetup/install/files/lib/system/html/input/node/HtmlInputNodeTextParser.class.php
Simple merge

diff --cc wcfsetup/install/files/lib/system/html/output/node/HtmlOutputNodeA.class.php
Simple merge

diff --cc wcfsetup/install/files/lib/system/html/output/node/HtmlOutputNodeImg.class.php
Simple merge

diff --cc wcfsetup/install/files/lib/system/message/embedded/object/MessageEmbeddedObjectManager.class.php
Simple merge

diff --cc wcfsetup/install/files/lib/system/session/SessionHandler.class.php
Simple merge

diff --cc wcfsetup/install/files/lib/system/worker/AbstractRebuildDataWorker.class.php
Simple merge

diff --cc wcfsetup/install/files/lib/util/HeaderUtil.class.php
Simple merge

diff --cc wcfsetup/install/files/lib/util/MessageUtil.class.php
index f6192b12176229ab87e3a7556399ad4024dd173c,589c06699399d7d386cce2c587c8f6fa80501fe9..4c2e22bb946c25a77316cb82a59222077f9899e7
--- 1/wcfsetup/install/files/lib/util/MessageUtil.class.php
--- 2/wcfsetup/install/files/lib/util/MessageUtil.class.php
+++ b/wcfsetup/install/files/lib/util/MessageUtil.class.php
@@@ -1,6 -1,6 +1,7 @@@
  <?php
 +declare(strict_types=1);
  namespace wcf\util;
+ use wcf\system\application\ApplicationHandler;
  use wcf\system\html\input\HtmlInputProcessor;
  use wcf\system\Regex;