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...
{
    auto it = g_already_asked_for.find(txid);
    if (it == g_already_asked_for.end()) {
        g_already_asked_for.insert(std::make_pair(txid, request_time));
    } else {
        g_already_asked_for.update(it, request_time);
    }
}
std::chrono::microseconds CalculateTxGetDataTime(const uint256& txid, std::chrono::microseconds current_time, bool use_inbound_delay) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
{
    std::chrono::microseconds process_time;
    const auto last_request_time = GetTxRequestTime(txid);
    
    if (last_request_time.count() == 0) {
        process_time = current_time;
    } else {
        
        
        process_time = last_request_time + GETDATA_TX_INTERVAL + GetRandMicros(MAX_GETDATA_RANDOM_DELAY);
    }
    
    if (use_inbound_delay) process_time += INBOUND_PEER_TX_DELAY;
    return process_time;
}
void RequestTx(CNodeState* state, const uint256& txid, std::chrono::microseconds current_time) EXCLUSIVE_LOCKS_REQUIRED(cs_main)