Allow Compression + encryption (#11103)

docs/bucket/versioning/DESIGN.md

@@ -26,7 +26,7 @@ Once the header is validated, we proceed to the actual data structure of the `xl
 - LegacyObjectType (preserves existing deployments and older xl.json format)
 - DeleteMarker (a versionId to capture the DELETE sequences implemented primarily for AWS spec compatibility)
 
-A sample msgpack-JSON `xl.meta`, you can debug the content inside `xl.meta` using [xl-meta-to-json.go](https://github.com/minio/minio/blob/master/docs/bucket/versioning/xl-meta-to-json.go) program.
+A sample msgpack-JSON `xl.meta`, you can debug the content inside `xl.meta` using [xl-meta.go](https://github.com/minio/minio/blob/master/docs/bucket/versioning/xl-meta.go) program.
 ```json
 {
   "Versions": [

docs/bucket/versioning/xl-meta.go

@@ -56,11 +56,12 @@ GLOBAL FLAGS:
 	}
 
 	app.Action = func(c *cli.Context) error {
-		if !c.Args().Present() {
-			cli.ShowAppHelp(c)
-			return nil
+		files := c.Args()
+		if len(files) == 0 {
+			// If no args, assume xl.meta
+			files = []string{"xl.meta"}
 		}
-		for _, file := range c.Args() {
+		for _, file := range files {
 			var r io.Reader
 			switch file {
 			case "-":