For now, assume all Unicode codepoints in range U+0100 - U+10FFFF
constitute a valid identifier. Note that we already do that for range
U+0080 - U+00FF.
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v3: wbemprox: Fix out-of-bounds access caused by codepoints above U+00FF.
https://gitlab.winehq.org/wine/wine/-/merge_requests/1170