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...
CNodeState *state = State(nodeid);
    assert(state != nullptr);
    ProcessBlockAvailability(nodeid);
    const CBlockIndex* pindex = LookupBlockIndex(hash);
    if (pindex && pindex->nChainWork > 0) {
        
        if (state->pindexBestKnownBlock == nullptr || pindex->nChainWork >= state->pindexBestKnownBlock->nChainWork) {
            state->pindexBestKnownBlock = pindex;
        }
    } else {
        
        state->hashLastUnknownBlock = hash;
    }
}
/**
 * When a peer sends us a valid block, instruct it to announce blocks to us
 * using CMPCTBLOCK if possible by adding its nodeid to the end of
 * lNodesAnnouncingHeaderAndIDs, and keeping that list under a certain size by
 * removing the first element if necessary.
 */
static void MaybeSetPeerAsAnnouncingHeaderAndIDs(NodeId nodeid, CConnman* connman) EXCLUSIVE_LOCKS_REQUIRED(cs_main)