Eliminate xtrans dependency
The xtrans abstraction layer is more hindrance than help these days, it would be pleasant to eliminate it. Most likely I'd start by copying the xtrans code into
os/ and then simplifying the resulting code.
Note that completely eliminating xtrans from the X server would also require eliminating it from libXfont, which could be either by merging xtrans there as well, or importing libXfont into the server and then merging xtrans.