libXext/buildlink3.mk, now that it is included there.
Leave the places where its API version is set or variables from it
are used directly (about 3 packages).
Packaged by Aleksey Cheusov and requested to import in PR 35665.
XXKB remembers the layout for each application window and changes the
keyboard state accordingly when the window gets a focus, it also shows
the current keyboard layout (an XKB group) and allows to switch it
with a mouse click and has many other useful features.