title: connecting user specific DBus session in Qt C++
body: <p>in Python-dbus one can connect user specific dbus like ..</p>
  
  <pre><code>import dbus
  bus1 = dbus.bus.BusConnection("tcp:host=192.168.1.1,port=1234")
  </code></pre>
  
  <p>how can one achive the same in QtDbus in C++ ? all I can find is Just are static functions, like 
      QDBusConnection::SessionBus or QDBusConnection::SystemBus ... and possibility to connect the other user specific bus seems to be missing in QtDbus/C++ ? </p>
  
  <p>any example code or hint are welcomed.</p>