message: Allow P2SH/multisig addresses for operator rewards
  There is no reason left to stick with the P2PKH limitation
diff: @@ -239,8 +239,7 @@ bool CheckProUpServTx(const CTransaction& tx, const CBlockIndex* pindexPrev, CVa
  // don't allow to set operator reward payee in case no operatorReward was set
  return state.DoS(10, false, REJECT_INVALID, "bad-protx-operator-payee");
  }
  - // we may support P2SH later, but restrict it for now (while in transitioning phase from old MN list to deterministic list)
  - if (!ptx.scriptOperatorPayout.IsPayToPublicKeyHash()) {
  + if (!ptx.scriptOperatorPayout.IsPayToPublicKeyHash() && !ptx.scriptOperatorPayout.IsPayToScriptHash()) {
  return state.DoS(10, false, REJECT_INVALID, "bad-protx-operator-payee");
  }
  }
  