Update README

README.en.md

@@ -48,3 +48,5 @@ ALTER TABLE `user` ADD `prefer_formatted_code` TINYINT(1) NOT NULL DEFAULT 1 AFT
 To make code formatting work, `clang-format` needs to be installed. [migrates/format-old-codes.js](migrates/format-old-codes.js) may help formating old submissions' codes.
 
 Who upgraded from a commit BEFORE [c192e8001ac81cab132ae033b39f09a094587633](https://github.com/syzoj/syzoj/commit/c192e8001ac81cab132ae033b39f09a094587633) (Mar 23, 2019) **MUST** install `redis-server` and [pygments](http://pygments.org/) on the web server. Markdown contents may be broken by switching to new renderer, [migrates/html-table-merge-cell-to-md.js](migrates/html-table-merge-cell-to-md.js) may help the migration。
+
+Who upgraded from a commit BEFORE [7b03706821c604f59fe8263286203d57d634c421](https://github.com/syzoj/syzoj/commit/c192e8001ac81cab132ae033b39f09a094587633) (Mar 27, 2019) **MUST** add `RemainAfterExit=yes` to the systemd config file `syzoj-web.service`'s `[Service]` section to make sure that restart service can work properly.

README.md

@@ -48,3 +48,5 @@ ALTER TABLE `user` ADD `prefer_formatted_code` TINYINT(1) NOT NULL DEFAULT 1 AFT
 为使代码格式化功能正常工作，`clang-format` 需要被安装。[migrates/format-old-codes.js](migrates/format-old-codes.js) 可能对格式化旧提交记录的代码有帮助。
 
 从该 commit [c192e8001ac81cab132ae033b39f09a094587633](https://github.com/syzoj/syzoj/commit/c192e8001ac81cab132ae033b39f09a094587633)（2019 年 3 月 23 日）前更新的用户**必须**在网站服务器上安装 `redis-server` 与 [pygments](http://pygments.org/)。旧的 Markdown 内容可能因切换到新渲染器被破坏，[migrates/html-table-merge-cell-to-md.js](migrates/html-table-merge-cell-to-md.js) 可能对迁移有所帮助。
+
+从该 commit [7b03706821c604f59fe8263286203d57d634c421](https://github.com/syzoj/syzoj/commit/c192e8001ac81cab132ae033b39f09a094587633)（2019 年 3 月 27 日）前更新的用户**必须**在其 systemd 配置文件 `syzoj-web.service` 中的 `[Service]` 中加入一行 `RemainAfterExit=yes`，以使得重启服务功能正常工作。