-#define ACTION_MULTI_WAFER 1
-/** Index into current_action_spec::multi[] for filters to apply. */
-#define ACTION_MULTI_FILTER 2
+#define ACTION_MULTI_WAFER 1
+/** Index into current_action_spec::multi[] for content filters to apply. */
+#define ACTION_MULTI_FILTER 2
+/** Index into current_action_spec::multi[] for server-header filters to apply. */
+#define ACTION_MULTI_SERVER_HEADER_FILTER 3
+/** Index into current_action_spec::multi[] for client-header filters to apply. */
+#define ACTION_MULTI_CLIENT_HEADER_FILTER 4
+/** Index into current_action_spec::multi[] for client-header tags to apply. */
+#define ACTION_MULTI_CLIENT_HEADER_TAGGER 5
+/** Index into current_action_spec::multi[] for server-header tags to apply. */
+#define ACTION_MULTI_SERVER_HEADER_TAGGER 6