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Fix Flatpak applications bypassing X11 permission

msizanoen1 requested to merge msizanoen1/mutter:xwayland-enforce-auth into main

Currently, Flatpak applications can bypass the X11 permission setting and access the X server through abstract sockets when network access is enabled because X11 authentication is not enforced for the current user ID.

Fix this by always requiring X11 authentication for Xwayland.

Edited by msizanoen1

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