clone sd0 out of sd*.  my idea, initial hack by miod, my makefile hackery

Currently, the building of this is not enabled in "make release", however.

type characteristics.
internal_types.h will contain only settings invisible from standard C, e.g.,
in the __* or _[A-Z]* namespace, and be reused by files like limits.h.
This allows us to shorten machine/limits.h greatly, as all the common defines
are now in sys/limits.h, plus a small stub in internal_types.h.
Tested on all arches as far as I know.
Approved after discussion with art, millert, deraadt, and others.

Ok deraadt@, millert@

As a bonus, we do not need awk(1) anymore to run MAKEDEV.
ok deraadt@

No change in the generated output, so no regen needed.
ok todd@

No changes in the generated output, so no regen needed.
ok todd@

ok millert@

ok millert@

non-x86 packages (hfsplus, ogle-altivec, etc)
- mention that OpenSSH will be at 3.2 for this release
ok deraadt@

millert@ ok
deraadt@ ok to commit