Merge pull request #21529 from nextcloud/enh/encryption/improve_key_format

core/Command/Encryption/MigrateKeyStorage.php

core/register_command.php

lib/composer/composer/autoload_classmap.php

lib/composer/composer/autoload_static.php

lib/private/Encryption/Keys/Storage.php

lib/private/Repair.php

lib/private/Repair/NC20/EncryptionMigration.php

lib/private/Server.php

tests/lib/Encryption/Keys/StorageTest.php

version.php