message: Port endpoint_manager to latest node_id API
diff: @@ -119,7 +119,8 @@ public:
  template <class Manager>
  void resolve(Manager& mgr, std::string path, actor listener) {
  actor_id aid = 42;
  - node_id nid{42, "00112233445566778899aa00112233445566778899aa"};
  + auto hid = "0011223344556677889900112233445566778899";
  + auto nid = unbox(make_node_id(42, hid));
  actor_config cfg;
  auto p = make_actor<actor_proxy_impl, strong_actor_ptr>(aid, nid,
  &mgr.system(), cfg,
  