I think we can now consider /var/run fully deprecated and everyone has moved on to /run. Even Debian, who are normally very conservative, jumped on early with this transition, even before they adopted systemd. So we should update everything in ThinLinc to use /run instead of /var/run so we don't rely on compatibility behaviours.
We don't know of any practical changes of doing this at the moment. But we rely on the fact that /var/run is a symlink to /run at the moment. That symlink could in theory be removed in the future.
When running systemctl status on our services on SLES 15, I see the following warning: > PIDFile= references a path below legacy directory /var/run/, updating /var/run/<service name>.pid → /run/<service name>.pid; please update the unit file accordingly. Seen for: tlwebadm.service tlwebaccess.service vsmserver.service vsmagent.service
