Windows: Add servicing

Signed-off-by: John Howard <jhoward@microsoft.com>

Author: John Howard

config-windows.md

@@ -94,3 +94,15 @@ The following parameters can be specified:
         }
    }
 ```
+
+## <a name="configWindowsServicing" />Servicing
+
+You can indicate a container is being started in a mode where a Windows Update servicing operation is being applied via the OPTIONAL `servicing` field of the Windows configuration.
+
+### Example
+
+```json
+    "windows": {
+        "servicing": true
+    }
+```

specs-go/config.go

@@ -432,6 +432,8 @@ type SolarisAnet struct {
 type Windows struct {
 	// Resources contains information for handling resource constraints for the container.
 	Resources *WindowsResources `json:"resources,omitempty"`
+	// Servicing indicates if the container is being started in a mode to apply a Windows Update servicing operation.
+	Servicing bool `json:"servicing,omitempty"`
 }
 
 // WindowsResources has container runtime resource constraints for containers running on Windows.