Where did some of these files come from?

We've missed the boat for most of 'em, but try to make annotation
here going forward.

procnet-snmp-2.6.32

procnet-snmp-3.19.0

procnet-snmp-5.14.0
    vm26 (CentOS Stream9 [kernel=5.14.0]), circa 30 Mar 2023

procnet-snmp-5.14.7
