Qt API for setting TOS/DSCP bits of UDP/TCP sockets

The current Qt networking API is missing the possibility of setting the ToS/DSCP bits of the outgoing IP packets. These bits are used for QoS purposes in the network and in the WLAN protocol stack. Altough it is possible to get a handle to the "native" operating system socket through Qt and set the socket options that way, it would be better to have the possibility of setting the bits with QAbstractSocket::setSocketOption() .