Fix systemd CVE-2018-15687

https://security-tracker.debian.org/tracker/CVE-2018-15687
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=912007

Related issues

Related to #16097 (closed)
Related to #16184 (closed)
Blocks #15506 (closed)

Original created by @intrigeri on 16100 (Redmine)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information