bump runc@b263a43430ac6996a4302b891688544225197294

Signed-off-by: Antonio Murdaca <runcom@redhat.com>

vendor/github.com/opencontainers/runc/libcontainer/README.md

@@ -1,3 +1,7 @@
+# libcontainer
+
+[![GoDoc](https://godoc.org/github.com/opencontainers/runc/libcontainer?status.svg)](https://godoc.org/github.com/opencontainers/runc/libcontainer)
+
 Libcontainer provides a native Go implementation for creating containers
 with namespaces, cgroups, capabilities, and filesystem access controls.
 It allows you to manage the lifecycle of the container performing additional operations
@@ -16,7 +20,14 @@ the current binary (/proc/self/exe) to be executed as the init process, and use
 arg "init", we call the first step process "bootstrap", so you always need a "init"
 function as the entry of "bootstrap".
 
+In addition to the go init function the early stage bootstrap is handled by importing
+[nsenter](https://github.com/opencontainers/runc/blob/master/libcontainer/nsenter/README.md).
+
 ```go
+import (
+	_ "github.com/opencontainers/runc/libcontainer/nsenter"
+)
+
 func init() {
 	if len(os.Args) > 1 && os.Args[1] == "init" {
 		runtime.GOMAXPROCS(1)
@@ -77,12 +88,13 @@ config := &configs.Config{
 		Parent: "system",
 		Resources: &configs.Resources{
 			MemorySwappiness: nil,
-			AllowAllDevices:  false,
+			AllowAllDevices:  nil,
 			AllowedDevices:   configs.DefaultAllowedDevices,
 		},
 	},
 	MaskPaths: []string{
 		"/proc/kcore",
+		"/sys/firmware",
 	},
 	ReadonlyPaths: []string{
 		"/proc/sys", "/proc/sysrq-trigger", "/proc/irq", "/proc/bus",
@@ -184,10 +196,10 @@ process := &libcontainer.Process{
 	Stderr: os.Stderr,
 }
 
-err := container.Start(process)
+err := container.Run(process)
 if err != nil {
-	logrus.Fatal(err)
 	container.Destroy()
+	logrus.Fatal(err)
 	return
 }
 
@@ -219,6 +231,15 @@ container.Resume()
 
 // send signal to container's init process.
 container.Signal(signal)
+
+// update container resource constraints.
+container.Set(config)
+
+// get current status of the container.
+status, err := container.Status()
+
+// get current container's state information.
+state, err := container.State()
 ```