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present: Check PresentOptionAsyncMayTear against capabilities

Olivier Fourdan requested to merge ofourdan/xserver:present-bump-version-to-1.3 into master

The option PresentOptionAsyncMayTear is only supported by Xwayland for now, yet the Present supported version advertised is the same for all Xservers.

So a client may try to use PresentOptionAsyncMayTear on a plain Xorg server and not get the expected result.

Check that PresentCapabilityAsyncMayTear is advertised if the client specifies PresentOptionAsyncMayTear in the present options, and fail with a BadValue error otherwise.

Edited by Olivier Fourdan

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