XDMCP depends on client address to distigush each client for Query,BroadcastQuery and IndirectQuery packet,when multiple sessions from a single client address act at the same time,display manager(usually xdm or dtlogin) will confused and cann't act correctly for each client.XDMCP should add more info to such packet to distigush clients from a single client address,such as Xserver Pid or display number.
Adding missing QA contact
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