I was messing around with min relay policies and found that under certain circumstances the mempool will accept things, then not relay to any peers.

Example made using wallet:
Transaction of size 6195, fee of 619 satoshis, minrelay of 100 satoshis per kvB. Mempool logic allows it:

```
        // No transactions are allowed below minRelayTxFee except from disconnected blocks
        if (!bypass_limits && nModifiedFees < ::minRelayTxFee.GetFee(nSize)) {
            return state.DoS(0, false, REJECT_INSUFFICIENTFEE, "min relay fee not met", false, strprintf("%d < %d", nModifiedFees, ::minRelayTxFee.GetFee(nSize)));
        }
```
and lets it into mempool

but in net_processing.cpp:

```
                    if (filterrate && txinfo.feeRate.GetFeePerK() < filterrate) {
                        continue;
                    }
```
this gets hit because the computed feerate is insufficient(printing I added):
```
0.00000099 BTC/kB
```

I'm not super at arithmetic so I'm opening this up in case someone has an easy fix. 

let me also get a reproducible test failure with this...
case ValidationInvalidReason::BLOCK_INVALID_PREV:
        {
            LOCK(cs_main);
            Misbehaving(nodeid, 100, message);
        }
        return true;
    
    case ValidationInvalidReason::BLOCK_MISSING_PREV:
        {
            
            LOCK(cs_main);
            Misbehaving(nodeid, 10, message);
        }
        return true;
    case ValidationInvalidReason::RECENT_CONSENSUS_CHANGE:
    case ValidationInvalidReason::BLOCK_TIME_FUTURE:
    case ValidationInvalidReason::TX_NOT_STANDARD:
    case ValidationInvalidReason::TX_MISSING_INPUTS:
    case ValidationInvalidReason::TX_PREMATURE_SPEND:
    case ValidationInvalidReason::TX_WITNESS_MUTATED:
    case ValidationInvalidReason::TX_CONFLICT:
    case ValidationInvalidReason::TX_MEMPOOL_POLICY:
        break;
    }
    if (message != "") {
        LogPrint(BCLog::NET, "peer=%d: %s\n", nodeid, message);
    }
    return false;
}
static bool BlockRequestAllowed(const CBlockIndex* pindex, const Consensus::Params& consensusParams) EXCLUSIVE_LOCKS_REQUIRED(cs_main)