MFC r332345, r332346, r332661, r333005

r332345:
Fix makefs invocation after r331843.

r332346:
Fix the position of $bootable so that -o platformid=efi applies correctly.

r332661:
Generate hybrid ISO images for amd64.

This keeps the existing El Torito entries for BIOS and UEFI boot code and
adds a GPT in the ISO image's System Area containing boot code for BIOS that
will load /boot/loader from the ISO filesystem and execute it. We then use
etdump to find the EFI System Partition image in the El Torito catalog and
add an entry to the GPT that allows EFI to find it.

r333005:
Allow etdump, makefs and mkimg to be overridden.

Recent changes to makefs and mkimg have led to situations where the
disconnect between this script and the versions installed on the host cause
failures. Provide a way to work around this that doesn't require the
installation of new versions to the host system if that's not desired.

With this change mkisoimages.sh will honour the $ETDUMP, $MAKEFS and $MKIMG
environment variables but fall back to the previous behaviour of finding them
within $PATH.

Sponsored by: iXsystems, Inc.

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Increase efiboot.img size used in ISO creation

Due to recent and upcoming changes to add additional functionality to
the EFI loader its now bigger than the space allocates for efiboot.img
so increase this in line with boot1.efifat.

MFC after: 2 weeks
X-MFC-With: r293268
Sponsored by: Multiplay

Merge ^/projects/release-install-debug:

- Rework MANIFEST generation and parsing via bsdinstall(8).
- Allow selecting debugging distribution sets during install.
- Rework bsdinstall(8) to fetch remote debug distribution sets
when they are not available on the local install medium.
- Allow selecting additional non-GENERIC kernels during install.
At present, GENERIC is still required, and installed by default.

Tested with: head@r293203
Sponsored by: The FreeBSD Foundation

Fix argument quoting and remove unnecessary braces

MFC after: 3 weeks
X-MFC-to: stable/10

Now that GENERIC can boot on UEFI systems (r268158), switch the build to use
UEFI-compatible images. These will boot as before on BIOS systems, but will
boot using the UEFI loader on UEFI-aware systems.

Add script to setup bootable CD ISOs for both BIOS and EFI systems. Tested
and working on QEMU. Actually using this script as the regular image
generator, like with the memstick one, will require that the kernel support
EFI too. In particular, the following two things are required:
1. vt(9) be the default console driver
2. vt_efifb and vt_vga be able to coexist usefully in the same kernel

One other note here is that this requires newfs_msdos and mdconfig, which is
really ugly. NetBSD's makefs at least seems to support FAT now. If that
actually works, it should be imported and we can get rid of the mdconfig mess.

- Add CHECKSUM.* support in Makefile[1].
- Use ln -fs to create a symlink.
- Remove pkgadd for docports.
- Use WITHOUT_JADETEX=yes instead of WITH_JADETEX=no.
- Add {WORLD,KERNEL}_FLAGS to [BTWK]MAKE.
- Use makefs(8) and gpart(8) for sparc64 ISO image[2].
- Add publisher option to makefs(8)[2].

Based on work by: gjb[1]
Discussed with: marius, nwhitehorn[2]

ISO 9660 specification allows only "d-characters" and "a-characters" in the
Volume Descriptor (section 7.4). In short, upper-case alphanumeric + some
symbols only. While the makefs utility automatically converts the characters,
$LABEL should be consistent in the scripts.

Garbage collect some unused variables and stray debug code.

Submitted by: marius

Repair release CD generation on PC98 and sun4v after release building
changes, and backport the new logic (ISO images are TARGET dependant, not
TARGET_CPUARCH dependant) to Makefile.sysinstall. While modifying ISO
image scripts, change several archs to use makefs (from base) instead of
mkisofs (from ports) which makes release CD generation both faster and
self-hosting.

Use labels to find release media instead of hard-coded device paths. This
makes booting more reliable (and working at all on USB sticks). While here,
move responsibility for setting up fstab into the various platform mk-*.sh
scripts.

Suggested by: many

The current version of mkisofs is warning us that the -P option will
be changing with the next version, and we should be using -publisher
instead.

Also warned by: trhodes
MFC after: 1 week

Add a publisher variable with the URL for the FreeBSD Project, and put
this into the ISO headers by specifying the -P option to mkisofs.

Obtained from: share/examples/worm/makecdfs.sh

Set BATCH=yes to avoid bumping into interactivity in the port builds.

XXX /usr/ports is still hardcoded, should be ${PORTSDIR}

mkisofs(8) is now installed by sysutils/cdrtools.

This will be instantly MFC'ed.

Switch to using cdboot for booting i386 CD's by default.

Approved by: murray

Providing long filename support on the Macintosh requires over 30
megabytes of additional space on the install CD. Given our premium
for space, I don't think this is a wise use of 30MB. HFS support was
not provided on the FreeBSD 4.4 CDs and I received a grand total of 0
complaints.

Previous change to try to build `mkisofs' was
Submmitted by: dirk

Try to build `mkisofs' first, and only `pkg_add -r' if you cannot.

Fix my backwards logic.

Submitted by: dirk

+ do not hard code where a port may be installed to
+ uses `mkisofs' rather than `mkhybrid' as the new mkisofs is the merger
of the two
+ checks for `setcdboot's existsance and tries to pkg_add it if needed
+ removes English contraction

Approved by: jkh

Add scripts and Makefile support for building ISO images automatically
as part of the release if MAKE_ISOS is set. Will also build the
first CD with packages (in addition to the "minimal" CD) if CD_EXTRA_BITS
points to them. This probably need a bit more work to get fully useful,
but it at least covers the basics for now.