message: Update encryptwallet return message
diff: @@ -2175,7 +2175,11 @@ UniValue encryptwallet(const UniValue& params, bool fHelp)
  // slack space in .dat files; that is bad if the old data is
  // unencrypted private keys. So:
  StartShutdown();
  - return "wallet encrypted; Zcoin server stopping, restart to run with encrypted wallet. The keypool has been flushed and a new HD seed was generated (if you are using HD). You need to make a new backup.";
  +
  + std::string warning = "wallet encrypted; Zcoin server stopping, restart to run with encrypted wallet.";
  + if(pwalletMain->GetHDChain().nVersion < CHDChain::VERSION_WITH_BIP39)
  + warning += "The keypool has been flushed and a new HD seed was generated (if you are using HD). You need to make a new backup.";
  + return warning;
  }
  UniValue lockunspent(const UniValue& params, bool fHelp)
  