For software that interfaces with Bitcoin Core via RPC, it can be useful to know whether the fRelayTxes flag is set. It could be added to `getnetworkinfo`.

{
                CTxMemPool::txiter mi = pool.mapTx.find(hashConflicting);
                if (mi == pool.mapTx.end())
                    continue;
                
                setIterConflicting.insert(mi);
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                CFeeRate oldFeeRate(mi->GetModifiedFee(), mi->GetTxSize());
                if (newFeeRate <= oldFeeRate)
                {
                    return state.DoS(0, false,
                            REJECT_INSUFFICIENTFEE, "insufficient fee", false,
                            strprintf("rejecting replacement %s; new feerate %s <= old feerate %s",
                                  hash.ToString(),
                                  newFeeRate.ToString(),