Merge bitcoin/bitcoin#23336: refactor: Make GenTxid boolean constructor private

fa4ec1c0bd Make GenTxid boolean constructor private (MarcoFalke)
faeb9a5753 remove unused CTxMemPool::info(const uint256& txid) (MarcoFalke)

Pull request description:

  This boolean argument is either verbose (when used with a named arg) or unintuitive and dangerous (when used as a plain bool).

  Fix that by making the constructor private.

ACKs for top commit:
  laanwj:
    Code review ACK fa4ec1c0bd
  jnewbery:
    Code review ACK fa4ec1c0bd
  glozow:
    code review ACK fa4ec1c0bd

Tree-SHA512: bf08ee09168885cfda71e5a01ec412b93964662a90dd9d91e75f7fdf2eaff7c21a95204d0e90b00438bfeab564d0aea66bdb9c0394ee7a05743e65a817159446

src/net_processing.cpp

@@ -3243,7 +3243,7 @@ void PeerManagerImpl::ProcessMessage(CNode& pfrom, const std::string& msg_type,
         // already; and an adversary can already relay us old transactions
         // (older than our recency filter) if trying to DoS us, without any need
         // for witness malleation.
-        if (AlreadyHaveTx(GenTxid(/* is_wtxid=*/true, wtxid))) {
+        if (AlreadyHaveTx(GenTxid::Wtxid(wtxid))) {
             if (pfrom.HasPermission(NetPermissionFlags::ForceRelay)) {
                 // Always relay transactions received from peers with forcerelay
                 // permission, even if they were already in the mempool, allowing
@@ -3313,7 +3313,7 @@ void PeerManagerImpl::ProcessMessage(CNode& pfrom, const std::string& msg_type,
                     // wtxidrelay peers.
                     // Eventually we should replace this with an improved
                     // protocol for getting all unconfirmed parents.
-                    const GenTxid gtxid{/* is_wtxid=*/false, parent_txid};
+                    const auto gtxid{GenTxid::Txid(parent_txid)};
                     pfrom.AddKnownTx(parent_txid);
                     if (!AlreadyHaveTx(gtxid)) AddTxAnnouncement(pfrom, gtxid, current_time);
                 }