[2] Fix xdm on Alpha by using NetBSD's version of Wraphelp.c
[3] Report buttons 7 and when using sysmouse protocol
[4] Fix missing symbols in r128 driver.
[5] Reset /usr/X11R6/bin/X to Xwrapper-4 after install if Xwrapper-4 exists.
PR: [1] i386/44203
[2] ports/43664
[3] ports/43232