Bug#890517: killer's CRON logs out users once per hour
> This is at most a dirty work around. The killer command wipes
> x2goagent hourly and this must be prevented in killer itself somehow.
> With the above patch you disable killer system-wide once at least one
> X2Go Session is running on the host. Not the right approach.
It do not sound like a too bad approach either, given that X2Go fail to
register its sessions in the standard unix way. It seem like the safe
option to just disable killer if X2Go is detected.