PATCH_VER 0.2.7. Update Newport acceleration patch to 5200_all_6.8.0-newport-accel...

PATCH_VER 0.2.7. Update Newport acceleration patch to 5200_all_6.8.0-newport-accel-v2.patch. This fixes an error "structure has no member named `PUToScreenTextureDstFormats'," which should start with CPU, not PU. It also moves the autoloading of the xaa module around (#38549). Newport acceleration patch is by Dominik Behr, with mods by Adam Jackson. Drop 0155_all_4.3.0-Xi-Xinitthreads-locking-bug.patch. It was fixed in an alternate way in the release, and this was causing problems with totem and kaffeine (#64929, #59746, maybe #60131). Add 6100_all_6.8.0-xnest-uninitialized-GetWindowPixmap.patch (#70431). Alexander Gottwald says on fd.o #1404: "pScreen->GetWindowPixmap is never initialized in Xnest startup and contains random data. After some server resets it crashes with segfault because pScreen->GetWindowPixmap is called but is not a valid function. A quick fix was to set the complete ScreenRec structure to null after allocating it in dix/main.c (AddScreen)."