+
+ /*
+ * Use query type of ANY if possible (NO_WILDCARD_MX), which will
+ * find types CNAME, A, and MX, and will cause all existing records
+ * to be cached by our local server. If there is (might be) a
+ * wildcard MX record in the local domain or its parents that are
+ * searched, we can't use ANY; it would cause fully-qualified names
+ * to match as names in a local domain.
+ */
+# define NO_WILDCARD_MX 1