fix few typos in comments.

branches: 1.20.2;
Add missing stuff for vax

Do not populate /dev on CD images by default, instead rely on init
doing the tmpfs / MAKEDEV magic.
On images for machines with serious ram shortage (where the additional
tmpfs hurts, like VAX) override this with CDDEV_POPULATE=true.
Should fix PR port-amd64/54776.

Consistently use ${RELEASEDIR}/${RELEASEMACHINE} instead of
${RELEASEDIR}/${MACHINE} (Paul Ripke)

branches: 1.17.2;
Now that we do not force debug sets off install CDs any more, explicitly
set CDRELEASE_NODEBUG everywhere.

branches: 1.16.10; 1.16.12;
Initial pass to be unaffected by build umask on build artifacts
1. ${MKDIR} -> ${MKDIR} ${MKDIRPERM}
2. ${CP} -> ${INSTALL} ${COPY} -m <perm>

branches: 1.15.2; 1.15.4;
Make sure to copy the language catalog files for sysinst, but do not
copy sysinst itself to / on the CD, and instead use the base version
for installation.

2nd try: make amd64, i386, sparc64 and vax iso images use full sets.
While there fix an old bug that makefs used the build hosts /etc/group
and passwd information when creating the image.
Thanks to Andreas Gustafsson for extensive testing.

Revert previous untill fallout has been fixed.

Add a new simple method to put whole sets on CD images (instead of
listing single binaries or patterns) and use those for the existing
ISO images.

Add libpthread.so* - new lzma needs it.

Punt custom dhcpcd hooks in favour up upstream hooks

CD images need libarchive if MKBSDTAR is yes.

branches: 1.8.2;
Adjust for sysinst move.

When uncompressing the kernel, allow overwriting of an existing one in the
cdrom content directory - this helps update builds.

Instead of running MAKEDEV inside the image content dir (which would only
work for root), make it emit a mtree spec file and pass that to makefs.
This should also work for unprivileged builds.
Problem pointed out by Izumi Tsutsui.

Pre-populate /dev on the CD - with rockridge extensions we can do this and
it saves us one tmpfs (or mfs) instance, which helps quite a bit on low
memory machines.

The current vax /boot is super slow unziping kernels - and this is a CD, wich
has space enough, so unzip the kernel on it to speed up the boot process.
XXX The /boot bug should nevertheless be fixed.

Use GENERIC instead of INSTALL (including the ramdisk) for this CD image
and mount the CD filesystem as root instead for installation.

branches: 1.2.6; 1.2.18;
use ${CDIMAGE} instead of ${CDBASE}.iso

branches: 1.1.2; 1.1.14; 1.1.22; 1.1.30; 1.1.38; 1.1.40;
Add an iso_image target (iso-image as a target name doesn't play well with
bsd.subdirs.mk) in distrib/makefile, which builds an iso image for $MACHINE
with binary sets, stored in ${RELEASEDIR}/iso. The image is bootable for:
alpha, amd64, cats, i386, pmax, sgimips, sparc, sparc64, sun3, vax.
mac68k/macppc no there yet because of missing feature in makefs.

call iso_image in distrib/ for iso-image in the top Makefile.