Merge pull request #13182 from owncloud/download_versions

apps/files_encryption/lib/crypt.php

apps/files_encryption/lib/helper.php

apps/files_encryption/lib/proxy.php

apps/files_encryption/lib/stream.php

apps/files_encryption/lib/util.php

apps/files_encryption/tests/helper.php

apps/files_encryption/tests/share.php

apps/files_encryption/tests/testcase.php

apps/files_encryption/tests/util.php

apps/files_versions/lib/storage.php