GitHub seems to set the domainpart of all internal links, relative or
absolute, to the projects base path.
Gitea seems to only adjusts relative links in Markdown-syntax and
leaves everything else as is. This is conceptually cleaner, but broke
existing links relying on GitHubs behaviour. This should now be fixed.
German version did point to `FINDSTR` in Linux, which does not work.
Also `android-tools-adb` is just a transitional package pointing to `adb` in
newer Debian versions and will eventually be removed from new releases.
