fixed inproper detection of Windows 8+
fixed inproper detection of Windows 8+

all versions above Windows 8 are detected as post2008Server. The value
is made lower case while it attempts to match against an upper case value,
so it will never match.

'post2008Server' -> 'post2008server'

BigBrother-International/gst-cerbero,BigBrother-International/gst-cerbero,BigBrother-International/gst-cerbero,BigBrother-International/gst-cerbero,BigBrother-International/gst-cerbero