Add policy for property service.
New property_contexts file for property selabel backend.
New property.te file with property type declarations.
New property_service security class and set permission.
Allow rules for setting properties.
diff --git a/access_vectors b/access_vectors
index 90927e7..4b0c4b1 100644
--- a/access_vectors
+++ b/access_vectors
@@ -880,3 +880,8 @@
 	specifyinvokewith
 	specifyseinfo
 }
+
+class property_service
+{
+	set
+}