message: Remove the check for IsUAHFforkActiveOnNextBlock() in tx admission process
  Since activation block is buried under 19 months of PoW and 4 checkpoints
  I think this is something we could stop checking for.
diff: @@ -957,7 +957,7 @@ bool ParallelAcceptToMemoryPool(Snapshot &ss,
  entry.sighashType = sighashType | sighashType2;
  // This code denies old style tx from entering the mempool as soon as we fork
  - if (IsUAHFforkActiveOnNextBlock(chainActive.Tip()->nHeight) && !IsTxUAHFOnly(entry))
  + if (!IsTxUAHFOnly(entry))
  {
  return state.Invalid(false, REJECT_WRONG_FORK, "txn-uses-old-sighash-algorithm");
  }
  