[Xcb] question about the xml implementation

[Jamey Sharp]

Hey Vincent!

I just want to point out that XKB support would be an incremental
improvement to any keyboard-handling code for XCB. The important thing
right now is to get any sort of keyboard support at all; and for that
all we need is the core protocol.

The fact that we haven't yet built support into XML-XCB for parts of the
XKB protocol suggests to me that you shouldn't be focusing on that quite
yet, although the things that you've found are hard in that extension
are good things for us to know about.

--Jamey