[Xcb] [ANNOUNCE] xcb-util 0.3.8

[Knut Petersen]

> It looks like the intention was to merge them all into one file, but there are still missing symbols from the old -aux, -atom, -event that are not in the new lib (some of which were mentioned in the ChangeLog, others which weren't)
>
> So, do I need to ship two versions of xcb-util to customers, or is this going to be reversed to fix binary compatibility?
>

An outdated ModularDevelopersGuide is a good way to put potential
testers off, but breaking compatibility is an even better way to reduce
the number of people actually testing the prerelease tree.

cu,
 Knut