Merge "Sort devices list before output." am: 18cdd350 am: e93f4e82

}

std::string list_transports(bool long_listing) {

    std::string result;

    std::lock_guard<std::recursive_mutex> lock(transport_lock);

    for (const auto& t : transport_list) {

    auto sorted_transport_list = transport_list;

    sorted_transport_list.sort([](atransport*& x, atransport*& y) {

        if (x->type != y->type) {

            return x->type < y->type;

        }

        return strcmp(x->serial, y->serial) < 0;

    });

    std::string result;

    for (const auto& t : sorted_transport_list) {

        append_transport(t, &result, long_listing);

    }

    return result;