message: Renable the check IsInitialBlockDownload() for txns during IBD
  We want to ensure we don't unnecessarily download txns during IBD.
  This will be more important as txn rates rise further.
diff: @@ -6016,7 +6016,7 @@ bool ProcessMessage(CNode *pfrom, string strCommand, CDataStream &vRecv, int64_t
  if (fBlocksOnly)
  LogPrint("net", "transaction (%s) inv sent in violation of protocol peer=%d\n", inv.hash.ToString(),
  pfrom->id);
  - else if (!fAlreadyHave && !fImporting && !fReindex) // BU removed && !IsInitialBlockDownload())
  + else if (!fAlreadyHave && !fImporting && !fReindex && !IsInitialBlockDownload())
  requester.AskFor(inv, pfrom); // BU manage outgoing requests. was: pfrom->AskFor(inv);
  }
  