Regression: QSettings create new file with too restrictive permissions

Since Qt 5.4.0, creating a new .ini file with the help of QSettings causes the file to have very limited rights (file permissions 600 on Unix). This is a regression from Qt 5.3 and earlier, where the same file was created with normal rights (644 typically).

Test case

   QSettings s("settings.ini", QSettings::IniFormat);
    s.setValue("some", "value");
    s.sync();
    QFileInfo file(s.fileName());
    qDebug() << "Can everyone read file?" <<  file.permissions().testFlag(QFile::ReadOther);