message: RPC: return the used stake modifier in getblock
diff: @@ -134,6 +134,8 @@ UniValue blockToJSON(const CBlock& block, const CBlockIndex* blockindex, bool tx
  if (pnext)
  result.push_back(Pair("nextblockhash", pnext->GetBlockHash().GetHex()));
  + result.push_back(Pair("modifier", strprintf("%016x", blockindex->nStakeModifier)));
  +
  result.push_back(Pair("moneysupply",ValueFromAmount(blockindex->nMoneySupply)));
  UniValue zpivObj(UniValue::VOBJ);
  