Link of "walkthrough of the example" broken

In the main repo wiki, under [user examples](https://github.com/harfbuzz/harfbuzz/wiki#user-examples), i followed the below links to this repo and its walkthrough, but the later one is broken.

> [harfbuzz-tutorial](https://github.com/harfbuzz/harfbuzz-tutorial), along with the [walk-though accompanying that](http://booki.flossmanuals.net/text-layout-with-harfbuzz/_draft/_v/1.0/hello-world-example-walkthrough/).

I searched on the flossmanuals website but didn't find anything related to "harfbuzz". I am trying to contact them to find out if they have the article and can restore it.

Meanwhile I was wondering if you guys have the walkthrough saved at some other place too? (I am trying to integrate harfbuzz into [Organic Maps](https://github.com/organicmaps/organicmaps/issues/4281) and wanted to study and understand some examples.)

首先检查主 repository wiki 的 User Examples 部分，以及其中链接的 harfbuzz-tutorial 和 FLOSS Manuals walkthrough URL。确定 walkthrough 是否存在于其他位置，或是否可以恢复；当用户拥有指向配套 walkthrough 的可用链接或明确的替代位置时，该 issue 即告解决。

由索引模型根据 Issue 内容生成。