Upgrade containerd to 1.6.2 and CNI to 0.9.1

Upgrades containerd, and switches to the official 64-bit ARM
binary.

Continues to use my binary for 32-bit arm hosts.

CNI upgraded to v0.9.1

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

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

@@ -1,7 +1,7 @@
 package selinux
 
 import (
-	"github.com/pkg/errors"
+	"errors"
 )
 
 const (
@@ -38,6 +38,8 @@ var (
 
 	// CategoryRange allows the upper bound on the category range to be adjusted
 	CategoryRange = DefaultCategoryRange
+
+	privContainerMountLabel string
 )
 
 // Context is a representation of the SELinux label broken into 4 parts
@@ -59,16 +61,30 @@ func ClassIndex(class string) (int, error) {
 	return classIndex(class)
 }
 
-// SetFileLabel sets the SELinux label for this path or returns an error.
+// SetFileLabel sets the SELinux label for this path, following symlinks,
+// or returns an error.
 func SetFileLabel(fpath string, label string) error {
 	return setFileLabel(fpath, label)
 }
 
-// FileLabel returns the SELinux label for this path or returns an error.
+// LsetFileLabel sets the SELinux label for this path, not following symlinks,
+// or returns an error.
+func LsetFileLabel(fpath string, label string) error {
+	return lSetFileLabel(fpath, label)
+}
+
+// FileLabel returns the SELinux label for this path, following symlinks,
+// or returns an error.
 func FileLabel(fpath string) (string, error) {
 	return fileLabel(fpath)
 }
 
+// LfileLabel returns the SELinux label for this path, not following symlinks,
+// or returns an error.
+func LfileLabel(fpath string) (string, error) {
+	return lFileLabel(fpath)
+}
+
 // SetFSCreateLabel tells the kernel what label to use for all file system objects
 // created by this task.
 // Set the label to an empty string to return to the default label. Calls to SetFSCreateLabel
@@ -253,6 +269,8 @@ func CopyLevel(src, dest string) (string, error) {
 // Chcon changes the fpath file object to the SELinux label label.
 // If fpath is a directory and recurse is true, then Chcon walks the
 // directory tree setting the label.
+//
+// The fpath itself is guaranteed to be relabeled last.
 func Chcon(fpath string, label string, recurse bool) error {
 	return chcon(fpath, label, recurse)
 }
@@ -280,5 +298,7 @@ func GetDefaultContextWithLevel(user, level, scon string) (string, error) {
 
 // PrivContainerMountLabel returns mount label for privileged containers
 func PrivContainerMountLabel() string {
+	// Make sure label is initialized.
+	_ = label("")
 	return privContainerMountLabel
 }