RCLConsensus::validate

Validate the given ledger and share with peers as necessary.

void
validate(
    RCLCxLedger const& ledger,
    NetClock::time_point now,
    bool proposing);

Name	Description
`ledger`	The ledger to validate
`now`	Current network adjusted time
`proposing`	Whether we were proposing transactions while generating this ledger. If we are not proposing, a validation can still be sent to inform peers that we know we aren't fully participating in consensus but are still around and trying to catch up.