message: Remove mempool global from p2p
diff: @@ -1715,7 +1715,7 @@ void static ProcessGetBlockData(CNode& pfrom, const CChainParams& chainparams, c
  }
  //! Determine whether or not a peer can request a transaction, and return it (or nullptr if not found or not allowed).
  -CTransactionRef static FindTxForGetData(const CNode& peer, const GenTxid& gtxid, const std::chrono::seconds mempool_req, const std::chrono::seconds now) LOCKS_EXCLUDED(cs_main)
  +static CTransactionRef FindTxForGetData(const CTxMemPool& mempool, const CNode& peer, const GenTxid& gtxid, const std::chrono::seconds mempool_req, const std::chrono::seconds now) LOCKS_EXCLUDED(cs_main)
  {
  auto txinfo = mempool.info(gtxid);
  if (txinfo.tx) {
  @@ -1771,7 +1771,7 @@ void static ProcessGetData(CNode& pfrom, const CChainParams& chainparams, CConnm
  continue;
  }
  - CTransactionRef tx = FindTxForGetData(pfrom, ToGenTxid(inv), mempool_req, now);
  + CTransactionRef tx = FindTxForGetData(mempool, pfrom, ToGenTxid(inv), mempool_req, now);
  if (tx) {
  // WTX and WITNESS_TX imply we serialize with witness
  int nSendFlags = (inv.IsMsgTx() ? SERIALIZE_TRANSACTION_NO_WITNESS : 0);
  @@ -2739,7 +2739,7 @@ void PeerLogicValidation::ProcessMessage(CNode& pfrom, const std::string& msg_ty
  }
  } else if (inv.IsGenTxMsg()) {
  const GenTxid gtxid = ToGenTxid(inv);
  - const bool fAlreadyHave = AlreadyHaveTx(gtxid, mempool);
  + const bool fAlreadyHave = AlreadyHaveTx(gtxid, m_mempool);
  LogPrint(BCLog::NET, "got inv: %s %s peer=%d\n", inv.ToString(), fAlreadyHave ? "have" : "new", pfrom.GetId());
  pfrom.AddKnownTx(inv.hash);
  @@ -3006,7 +3006,7 @@ void PeerLogicValidation::ProcessMessage(CNode& pfrom, const std::string& msg_ty
  std::list<CTransactionRef> lRemovedTxn;
  - // We do the AlreadyHave() check using wtxid, rather than txid - in the
  + // We do the AlreadyHaveTx() check using wtxid, rather than txid - in the
  // absence of witness malleation, this is strictly better, because the
  // recent rejects filter may contain the wtxid but rarely contains
  // the txid of a segwit transaction that has been rejected.
  