client-info: Support cgroup v2
For v2 cgroups the /proc//cgroup format changed to a single line¹. Support this too to not misdetect flatpaks as system apps.
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
For v2 cgroups the /proc//cgroup format changed to a single line¹. Support this too to not misdetect flatpaks as system apps.