Note Ticket #35
Pullup the following to netbsd-7  (requested by matt in ticket #37):
external/gpl3/gcc/dist/gcc/config/vax/builtins.md 1.4
external/gpl3/gcc/dist/gcc/config/vax/vax.c	1.10
	Rework so that the ctzsi builtin is supported.

lib/libc/compiler_rt/Makefile.inc		1.26
	VAX does need __clzsi2

libexec/ld.elf_so/arch/vax/rtld_start.S		1.23
libexec/ld.elf_so/arch/vax/rtld_start.S		1.24
	add a missing register prefix.
	Add proper registers for register counts.
pullup rev 1.120 of CHANGES.prev (requested by apb in ticket #30):
Formatting fixes, following the guidelines in the comments
at the top of CHANGES.
Pull up following revision(s) (requested by apb in ticket #31):
	share/man/man4/options.4: revision 1.440
Document options COMPAT_40, COMPAT_50, and COMPAT_60.
Some formatting and grammatical changes
Pull up following revision(s) (requested by macallan in ticket #40):
	external/mit/xorg/server/drivers/xf86-video-nv/Makefile: revision 1.7
put pci_device_has_kernel_driver(dev) into #if NV_TEST_FOR_KERNEL_DRIVER
at least for now there is nothing that keeps the nv driver from running
if a kernel driver other than vga is attached
Now this works again on macppc ( and x86 if you use for example genfb )
mention NV_TEST_FOR_KERNEL_DRIVER and explain why it isn't enabled for now
Pull up following revision(s) (requested by macallan in ticket #41):
	sys/arch/arm/omap/omapfb.c: revision 1.27
Do not assume that PAGE_SIZE is 4kB always.
Pull up following revision(s) (requested by apb in ticket #42):
	share/man/man8/man8.x86/boot.8: revisions 1.3, 1,4
Document fs, menu, rndseed, and splash commands.
Add rescue(8) to SEE ALSO.
Document supported subsets of image formats.
Pull up following revision(s) (requested by maxv in ticket #43):
	sys/miscfs/umapfs/umap_vfsops.c: revision 1.94
1) 'error' is returned while it does not even hold an error code. Which
   means that zero is returned, and the kernel keeps mounting (and it
   probably ends up in a deadlock/memory corruption somewhere).
2) 'nentries' and 'gnentries' are int and user-controlled, and there's no
   check to ensure they are greater than zero. Since they are used to
   compute the size of two copyin's, a user can control the copied size
   by giving a negative value (like 128-2^29), and thus overwrite kernel
   memory.
Both triggerable from root only.
Tickets 30, 31, 40, 41, 42 and 43.