Add vbox -- VirtualBox time sync driver

Sets time forward to match the host time.

Started automatically if the corresponding device is present.

etc/system.conf

@@ -524,6 +524,19 @@ service devman
 	uid 0;
 };
 
-
-
-
+service vbox
+{
+	system
+		UMAP		# 14
+		DEVIO		# 21
+	;
+	pci device	80ee/cafe;
+	ipc
+		SYSTEM
+		PM
+		RS
+		VM
+		pci
+	;
+	uid	0;
+};