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To recap: the original XC-SECURITY extension disallowed background "None" if the window was untrusted. XACE 1.0 preserved this check as a hook function. XACE pre-2.0 removed the hook and first abolished background "None entirely, then restored it as a global on/off switch in response to Bug #13683. Now it's back to being per-window, via a flag instead of a hook function.
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9.0 KiB