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...
{
    bool send = false;
    std::shared_ptr<const CBlock> a_recent_block;
    std::shared_ptr<const CBlockHeaderAndShortTxIDs> a_recent_compact_block;
    bool fWitnessesPresentInARecentCompactBlock;
    const Consensus::Params& consensusParams = chainparams.GetConsensus();
    {
        LOCK(cs_most_recent_block);
        a_recent_block = most_recent_block;
        a_recent_compact_block = most_recent_compact_block;
        fWitnessesPresentInARecentCompactBlock = fWitnessesPresentInMostRecentCompactBlock;
    }
    bool need_activate_chain = false;
    {
        LOCK(cs_main);
        const CBlockIndex* pindex = LookupBlockIndex(inv.hash);
        if (pindex) {
            if (pindex->HaveTxsDownloaded() && !pindex->IsValid(BLOCK_VALID_SCRIPTS) &&
                    pindex->IsValid(BLOCK_VALID_TREE)) {
                
                
                
                
                
                need_activate_chain = true;
            }
        }
    } 
    if (need_activate_chain) {