+/*
+ * Expiry policy for the autopurger
+ */
+#define EXPIRE_NEXTLEVEL 0 /* Inherit expiration policy */
+#define EXPIRE_MANUAL 1 /* Don't expire messages at all */
+#define EXPIRE_NUMMSGS 2 /* Keep only latest n messages */
+#define EXPIRE_AGE 3 /* Expire messages after n days */
+