I'm not sure what "suffix" was meant by this comment, but the file has the usual suffix. The file was added with the current name back in c4708f132381e4bbc864d5241381b5cde4f54878. Maybe an earlier version of the patch did something different. (cherry picked from commit 9c7188547cd53dddd635c86c8ef5655290541966)
System and Service Manager
Details
Most documentation is available on systemd's web site.
Assorted, older, general information about systemd can be found in the systemd Wiki.
Information about build requirements is provided in the README file.
Consult our NEWS file for information about what's new in the most recent systemd versions.
Please see the Code Map for information about this repository's layout and content.
Please see the Hacking guide for information on how to hack on systemd and test your modifications.
Please see our Contribution Guidelines for more information about filing GitHub Issues and posting GitHub Pull Requests.
When preparing patches for systemd, please follow our Coding Style Guidelines.
If you are looking for support, please contact our mailing list or join our IRC channel.
Stable branches with backported patches are available in the stable repo.