[REVIEW-3-5] fdo#47044 LibreOffice crashed when accessing Options / Internet / Proxy or Browser Plug-in settings

[Stephan Bergmann]

According to <https://bugs.freedesktop.org/show_bug.cgi?id=47044#c23> 
the long standing Windows-only proxy problem is solved with 
<http://cgit.freedesktop.org/libreoffice/core/commit/?id=0dded0d18a5945ed5a38623068ba7aa93da39df0> 
"fdo#47044: Adapt to different Windows versions' InternetQueryOption 
behavior."

I already cherry-picked it to libreoffice-3-6, and it would be great if 
somebody reviewed it for cherry-picking into libreoffice-3-5.  (I have 
no Windows builds for 3-5 or 3-6 at hand right now where I could quickly 
verify the backport compiles as-is, but from looking at the code I'm 
rather confident it does.)

Thanks,
Stephan