systemd fails to parse user that should run service

[Daniel Skowroński <daniel () dsinf net>]

Hi all,

Just wanted to bring attention to issue with systemd not doing what is expected when parsing User that should run 
service.
When it fails to parse string starting with digit it fails back to root causing obvious threat to security.

See discussion with developer on github: https://github.com/systemd/systemd/issues/6237

Best,
-Daniel Skowronski