Merge pull request #10248 from weeman1337/enhancement/9457-2

core/Controller/AvatarController.php

core/Controller/GuestAvatarController.php

core/routes.php

lib/composer/composer/autoload_classmap.php

lib/composer/composer/autoload_static.php

lib/private/Avatar/Avatar.php

lib/private/Avatar/AvatarManager.php

lib/private/Avatar/GuestAvatar.php

lib/private/Avatar/UserAvatar.php

lib/private/Repair.php

lib/private/Repair/ClearGeneratedAvatarCache.php

lib/private/Server.php

lib/public/Files/SimpleFS/InMemoryFile.php

lib/public/IAvatarManager.php

tests/Core/Controller/AvatarControllerTest.php

tests/Core/Controller/GuestAvatarControllerTest.php

tests/data/guest_avatar_einstein_32.png

tests/data/guest_avatar_einstein_32.svg

tests/data/test.pdf

tests/lib/Avatar/AvatarManagerTest.php