util.stanza: Allow U+7F Allowed by XML despite arguably being a control character. Drops the part of the range meant to rule out octets invalid in UTF-8 (\247 starts a 4-byte sequence), since UTF-8 correctness is validated by util.encodings.utf8.valid().

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local xpcall = xpcall;

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if select(2, xpcall(function (x) return x end, function () end,  "test")) ~= "test" then

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	xpcall = require"util.compat".xpcall;

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end

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return {

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	xpcall = xpcall;

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};