Method reset

src/server/server.hpp:83–86

        is_completed.store(true);
    }
    void reset() noexcept { 
        is_cancelled.store(false, std::memory_order_relaxed); 
        is_completed.store(false, std::memory_order_relaxed);
    }
    bool cancelled() const {
        return is_cancelled.load();
    }