xfree86/man: document AutoAddGPU

This at least mentions AutoAddGPU and hints at when you might
want to disable it.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Xi: Clamp XIClient maximal version to XIVersion

Do not allow setting client version to an arbitrary value >= XIVersion.
Fixes a test error with test/xi2/protocol-xiqueryversion.c, introduced by
commit 4360514d1c "Xi: Allow clients to ask for 2.3 and then 2.2 without failing"

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
test/xi2: fix protocol-xiqueryversion test

The old code was broken and allowed setting client version >= XIVersion,
this was fixed in the previous patch, but updating the value for XIVersion
broke the tests, so fix the tests too.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>