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...
}
        }
        if (bad) {
            LOCK(cs_main);
            Misbehaving(pfrom->GetId(), 100);
        }
        return true;
    }
    if (strCommand == NetMsgType::FILTERCLEAR) {
        if (pfrom->m_tx_relay == nullptr) {
            return true;
        }
        LOCK(pfrom->m_tx_relay->cs_filter);
        if (pfrom->GetLocalServices() & NODE_BLOOM) {
            pfrom->m_tx_relay->pfilter.reset(new CBloomFilter());
        }
        pfrom->m_tx_relay->fRelayTxes = true;
        return true;
    }
    if (strCommand == NetMsgType::FEEFILTER) {
        CAmount newFeeFilter = 0;
        vRecv >> newFeeFilter;
        if (MoneyRange(newFeeFilter)) {
            if (pfrom->m_tx_relay != nullptr) {
                LOCK(pfrom->m_tx_relay->cs_feeFilter);
                pfrom->m_tx_relay->minFeeFilter = newFeeFilter;
            }
            LogPrint(BCLog::NET, "received: feefilter of %s from peer=%d\n", CFeeRate(newFeeFilter).ToString(), pfrom->GetId());
        }
        return true;