Factor out common stuff.

Give lots of room for further expansion of the sparc64 CD image

Exclude compat sets from ISO images that struggle to fit on a CD-ROM

When debug is excluded, also exclude the compat debug sets.

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

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

branches: 1.29.2; 1.29.4;
Introduce CDRELEASE_NODEBUG - if set, avoids putting debug sets in the
ISO image.

Set this for sparc64 install CDs - many of the supported machines have
SCSI CD drives and it is impossible to get DVD replacements for those.

This is a pitty, but in the end a working install medium is more worth
than debug sets (which can be downloaded later).

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

branches: 1.27.2; 1.27.4;
Obey MKKMOD=no.
From Rin Okuyama in PR install/50061.

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.

Do not default any CD_SETS - let the MD makefiles request them specifically.

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: 1.18.2;
Adjust for sysinst move.

PR install/48818: put vi on install CDs

branches: 1.16.8;
Sync with amd64 and i386 installcds:
>> PR/47276: ftp has https support now
(i.e. now libcrypto and libssl are required in non-crunched installcd)

branches: 1.15.2;
Switch terminfo(3) to cdb(5).

branches: 1.14.2;
use ${CDIMAGE} instead of ${CDBASE}.iso

branches: 1.13.2;
Include liblzma to unbreak gzip on the install CD. (Hi Joerg!)

Apply Joerg's changes to x86 CDs here alos:
Include libgcc_s.so symlinks in /usr/lib, so that binaries in /usr
linked against it actually work.

We realy should split this into MD and MI lists and share the MI one.

branches: 1.11.2;
On install CDs: make ^C and ^Z work (mostly) as they used to do on
crunched/ramdisk install media again.
Fixes the remaining parts of PR 44738.

Add /usr/bin/getopt, it is needed by /usr/mdec/binstall.
Noticed by Jaime Fournier.

Adjust file lists for recent move:
usr/sbin/chown -> sbin/chown
usr/bin/chgrp -> bin/chgrp

Add /libdata/firmware and /usr/lib/libintl* to install CDROMs with
root on iso9660; fixes PR install/43692 and install/43693.

Um, as has been noted, INSTALL_FILE records what's installed if it's
done unprived, and that doesn't go down well on a re-build. So use
${INSTALL} ${COPY} instead to fix this problem.

Change use of ${CP} and ${CHMOD} to ${INSTALL_FILE}, so that if the
target is made un-writeable, the build won't bomb out during an
UPDATE build. OK'ed by martin@.

Ooops, do not try to create a symlink in a not-yet existing directory

Change the install CD to go to full multiuser mode. This clearly
separates the setup done by /etc/rc once, and the repeated stuff
(install.sh invoking sysinst).

Cherry-pick the /libexec content for (non miniroot) CDs and add the sysinst
specific dhcpcd hook scripts

Move install CDs over to / on cd9660 (instead of a memory disk image)

branches: 1.1.2; 1.1.14; 1.1.22; 1.1.30; 1.1.34;
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.