Every entry already says which log it came from, so -s narrows the output to
the ones asked for and "-s list" names what a node offers. Some of what a
platform keeps is noise: an AMI MegaRAC's event log is a list of redfish
sessions being opened and closed, while its useful records are elsewhere.
A selection cannot be cleared, since the platforms offer no such thing and
clearing more than was asked for is not something to do quietly.