Allow /proc/stat output rather than 11 columns

[xdrew]

I'm getting the following error:
{"level":"error","service":"pgscv","time":"2021-09-26T08:33:54Z","message":"system/cpu collector failed; collect cpu usage stats failed: invalid input, parse 'cpu 234443201 6 16537547 2863881788 0 0 0 0' failed: wrong number of values; skip"}

Maybe those additional columns may be ommitted somehow.

My postgresql master instance is on CentOS 7 container inside virtuozzo
Now I collect cpu utilization from zabbix but for the whole virtuozzo cluster, not only db

Thanks