[1] Upgrade to 4.2.0.
[2] Allow Wraphelp.c to be fetched by default, set HasXdmAuth=YES
by default.
Submitted by: [1] sf, taguchi@tohoku.iij.ad.jp
Approved by: [2] core
o use internal freetype2 for consistency with x11/XFree86-4.
o added xthreads obtained from x11/XFree86-4.
o install "ws" type config sample for xdm.
o build DRI only if kernel source installed in /sys.
o fix Riva128/SGRAM driver(patch-riva_hw.c).
PR: 24338(4.0.2)
Submitted by: maintainer, keith
