启动后，我运行server-start，报告
Warning (server): Unable to start the Emacs server. There is an existing Emacs server, named “server”. To start the server in this Emacs process, stop the existing server or call ‘M-x server-force-delete’ to forcibly disconnect it.
但是我用emacsclient无法连上，而我使用 server-force-delete，再运行server-start，emacsclient就能使用了。
