modules_k/rr: added record_route_preset() to exported API for use in app_lua

- Enhancement made by Hugh Waite at Crocodile RCS

modules_k/rr/api.c

@@ -56,6 +56,7 @@ extern int append_fromtag;
  */
 int load_rr( struct rr_binds *rrb )
 {
+	rrb->record_route_preset = record_route_preset;
 	rrb->record_route      = record_route;
 	rrb->loose_route       = loose_route;
 	rrb->add_rr_param      = add_rr_param;

modules_k/rr/api.h

@@ -56,6 +56,7 @@ typedef  int (*loose_route_f)(struct sip_msg*);
 /*! record-route API export binding */
 typedef struct rr_binds {
 	record_route_f       record_route;
+	record_route_f       record_route_preset;
 	loose_route_f        loose_route;
 	add_rr_param_t       add_rr_param;
 	check_route_param_t  check_route_param;