Update runc to v1.0.0-rc91

https://github.com/opencontainers/runc/releases/tag/v1.0.0-rc91

Signed-off-by: Davanum Srinivas <davanum@gmail.com>

vendor/github.com/opencontainers/selinux/go-selinux/label/label_selinux.go

@@ -3,6 +3,7 @@
 package label
 
 import (
+	"fmt"
 	"os"
 	"os/user"
 	"strings"
@@ -42,7 +43,7 @@ func InitLabels(options []string) (plabel string, mlabel string, Err error) {
 		if err != nil {
 			return "", "", err
 		}
-		mcsLevel := pcon["level"]
+
 		mcon, err := selinux.NewContext(mountLabel)
 		if err != nil {
 			return "", "", err
@@ -61,21 +62,16 @@ func InitLabels(options []string) (plabel string, mlabel string, Err error) {
 			}
 			if con[0] == "filetype" {
 				mcon["type"] = con[1]
-				continue
 			}
 			pcon[con[0]] = con[1]
 			if con[0] == "level" || con[0] == "user" {
 				mcon[con[0]] = con[1]
 			}
 		}
-		if pcon.Get() != processLabel {
-			if pcon["level"] != mcsLevel {
-				selinux.ReleaseLabel(processLabel)
-			}
-			processLabel = pcon.Get()
-			selinux.ReserveLabel(processLabel)
-		}
+		selinux.ReleaseLabel(processLabel)
+		processLabel = pcon.Get()
 		mountLabel = mcon.Get()
+		selinux.ReserveLabel(processLabel)
 	}
 	return processLabel, mountLabel, nil
 }
@@ -86,6 +82,24 @@ func GenLabels(options string) (string, string, error) {
 	return InitLabels(strings.Fields(options))
 }
 
+// FormatMountLabel returns a string to be used by the mount command.
+// The format of this string will be used to alter the labeling of the mountpoint.
+// The string returned is suitable to be used as the options field of the mount command.
+// If you need to have additional mount point options, you can pass them in as
+// the first parameter.  Second parameter is the label that you wish to apply
+// to all content in the mount point.
+func FormatMountLabel(src, mountLabel string) string {
+	if mountLabel != "" {
+		switch src {
+		case "":
+			src = fmt.Sprintf("context=%q", mountLabel)
+		default:
+			src = fmt.Sprintf("%s,context=%q", src, mountLabel)
+		}
+	}
+	return src
+}
+
 // SetFileLabel modifies the "path" label to the specified file label
 func SetFileLabel(path string, fileLabel string) error {
 	if !selinux.GetEnabled() || fileLabel == "" {