Introduce containerd-shim-runhcs-v1 on Windows

Implements the containerd-shim-runhcs-v1 shim on Windows for the runtime
v2 shim API.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>

vendor/github.com/Microsoft/hcsshim/internal/timeout/timeout.go

@@ -0,0 +1,26 @@
+package timeout
+
+import (
+	"os"
+	"strconv"
+	"time"
+)
+
+// Duration is the default time to wait for various operations.
+// - Waiting for async notifications from HCS
+// - Waiting for processes to launch through
+// - Waiting to copy data to/from a launched processes stdio pipes.
+//
+// This can be overridden through environment variable `HCS_TIMEOUT_SECONDS`
+
+var Duration = 4 * time.Minute
+
+func init() {
+	envTimeout := os.Getenv("HCSSHIM_TIMEOUT_SECONDS")
+	if len(envTimeout) > 0 {
+		e, err := strconv.Atoi(envTimeout)
+		if err == nil && e > 0 {
+			Duration = time.Second * time.Duration(e)
+		}
+	}
+}