Merge pull request #5977 from owncloud/encryption_enable_public_upload

apps/files/index.php

apps/files_encryption/lib/helper.php

apps/files_encryption/lib/keymanager.php

apps/files_encryption/lib/proxy.php

apps/files_encryption/lib/stream.php

apps/files_encryption/lib/util.php

apps/files_encryption/tests/keymanager.php

apps/files_sharing/public.php