Method ListPlugins

core/bessctl.cc:1703–1712

  }

  Status ListPlugins(ServerContext*, const EmptyRequest*,
                     ListPluginsResponse* response) override {
    std::lock_guard<std::recursive_mutex> lock(mutex_);

    auto list = bess::bessd::ListPlugins();
    for (auto& path : list) {
      response->add_paths(path);
    }
    return Status::OK;
  }

  Status ListMclass(ServerContext*, const EmptyRequest*,
                    ListMclassResponse* response) override {