This should be run at regular intervals (via cron or so) to keep
the comparisons up to date.
It is not necessarily a good idea to run this as part of the
runner.sh script as it will delay other tasks trying to
update the active project every time.
Probably OK to put it on a cronjbo every 2‒24 hours. If two
copies are running concurrently that should not break anything
but it will increase the server load.
