Merge remote-tracking branch 'origin/registry-update'

+ Registry: Add the new registry support
Upstream-commit: da01dd3d56a86f9a1256d3f80c0a4cac5d14bedb
Component: engine

components/engine/container.go

@@ -736,6 +736,14 @@ func (container *Container) ExportRw() (Archive, error) {
 	return Tar(container.rwPath(), Uncompressed)
 }
 
+func (container *Container) RwChecksum() (string, error) {
+	rwData, err := Tar(container.rwPath(), Xz)
+	if err != nil {
+		return "", err
+	}
+	return HashData(rwData)
+}
+
 func (container *Container) Export() (Archive, error) {
 	if err := container.EnsureMounted(); err != nil {
 		return nil, err