Clean shutdown behavior, signal handling

server.h

@@ -12,9 +12,11 @@ class Server {
   public:
 	Server(int port, const std::function<void(Request*)>& callback, int threads=1, const std::unordered_set<std::string_view>& headers={}, int max_request_len=(16*1024));
 	void Serve();
+	void Shutdown();
+	void RegisterSignalHandlers();
 
   private:
-	void NewConn(int listen_sock, int epoll_fd);
+	Connection *NewConn(int listen_sock, int epoll_fd);
 	int NewListenSock();
 	void ServeInt();
 
@@ -23,6 +25,8 @@ class Server {
 	const int threads_;
 	const std::unordered_set<std::string_view> headers_;
 	const int max_request_len_;
+
+	int close_fd_;
 };
 
 } // firecgi