message: [GUI] Masternodes wizard, IPv6 correctly stored between brackets.
diff: #include "activemasternode.h"
  #include <QFile>
  #include <QIntValidator>
  +#include <QHostAddress>
  #include <QRegExpValidator>
  MasterNodeWizardDialog::MasterNodeWizardDialog(WalletModel *model, QWidget *parent) :
  @@ -284,6 +285,13 @@ bool MasterNodeWizardDialog::createMN(){
  }
  std::string indexOutStr = std::to_string(indexOut);
  + // Check IP address type
  + QHostAddress hostAddress(addressStr);
  + QAbstractSocket::NetworkLayerProtocol layerProtocol = hostAddress.protocol();
  + if (layerProtocol == QAbstractSocket::IPv6Protocol) {
  + ipAddress = "["+ipAddress+"]";
  + }
  +
  boost::filesystem::path pathConfigFile("masternode_temp.conf");
  if (!pathConfigFile.is_complete()) pathConfigFile = GetDataDir() / pathConfigFile;
  FILE* configFile = fopen(pathConfigFile.string().c_str(), "w");
  