[Bug 51938] Safe Exam Browser needs "DNSDomain" from Win32_NetworkAdapterConfiguration

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=51938

--- Comment #8 from Louis Lenders  ---
Created attachment 71002
  --> https://bugs.winehq.org/attachment.cgi?id=71002
patch

Attached patch that fixes the bug. 
It returns empty DNSDomain; Seems like most test-bots return that. so might be
simplest solution. Note: on my windows 10 it returns nonempty
("dynamic.ziggo.nl")

Will send later for review