Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

MFC r245700,245701,245702,245706,245707,245758,245759,245760,245792,245796,
245980,246013:

Automated installation support for bsdinstall.

MFC r245680:

Make "Finish" the default choice in the partition editor. This lets you
successfully complete an installation with all defaults by pressing
Enter repeatedly until your machine reboots.

MFC miscellaneous bug fixes (r228042,228192,230522,232531,233473,233904,
235228,239500,241902,242188,243832,243854,244858,245333). This is mostly
documentation fixes and updates to the default FTP list that got left
behind in -CURRENT.

MFC r237253:
Remove variables which are initialized but never used thereafter reported by gcc46 warning

Approved by: cperciva (implicit)

MFC r230309:

Warn if trying to install over an existing partition, which usually fails
anyway due to libarchive not being able to overwrite schg flags.

PR: bin/164278

MFC r228048:
Plug memory leaks and fix open(2) error check.

Reviewed by: nwhitehorn

MFC r226666,226739,226741:
Avoid showing the user some spurious error messages from GEOM [1] and do
provide error messages instead of silent failure if there are no disks
or no network interfaces in the system [2].

PR: bin/161926 [1], bin/161926 [2]
Approved by: re (kib)

MFC r226161:
Avoid magicking into existence sub-partitions due to leftover blocks when
creating new ones by destroying any geom that may have come into
existence immediately after adding a partition. The EBR partition scheme
is particularly enthusiastic about false positives in this case.

Approved by: re (kib)

MFC r226160:
Usability enhancements: do not allow setting a mountpoint on bsdlabel
container partitions, which didn't do anything anyway, and check for
an existing freebsd-boot partition before bothering the user to make one.

PR: bin/160931
Approved by: re (kib)

MFC r226083:
Work around some behavior of gpart that I absolutely do not understand in
order to make every operation of the partition editor fully revertable.
Under *no circumstances* will it any longer touch the disks until the user
presses Finish and confirms it.

Approved by: re (kib)

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Fix a typo introduced in r219892 that prevented file system options from
being set correctly.

Approved by: re (kib)

Implement support for GRAID volumes in the installer partition editor,
rename a few options, clarify some help text, and add help text for the
buttons on the main partition editor screen.

Approved by: re (kib)

Add PS3 partitioning (and framework for future pseries support) to the
installer.

Add an extra tab between fs_file and fs_vfstype

Reviewed by: nwhitehorn

Disconnect sun4v architecture from the three.

Some files keep the SUN4V tags as a code reference, for the future,
if any rewamped sun4v support wants to be added again.

Reviewed by: marius
Tested by: sbruno
Approved by: re

Allow setting of parameters for file systems (e.g. softupdates), turn on
SUJ by default, and allow creation and mounting of FAT filesystems from
the installer.

Turn on softupdates by default. We need a UI to set filesystem parameters.

Only validate the partition setup when the user presses "Save". If the user
wants to exit without saving, it's not a problem if the disk is set up
in an invalid way.

Show disk model numbers in partition wizard screen. Also, since da(4) disks
are probably more likely to be USB or Firewire these days than SCSI, just
call them and anyone unknown "Disk" instead of SCSI disk.

Add a catch-all for miscellaneous RAID volumes while seeking a better
solution here. It would really help if CAM devices were part of newbus.

Don't present the user with spurious errors when overwriting a disk with
a deleted, but uncommitted, gpart.

Reported by: brucec

The PC98 gpart module supports labels now.

Import bsdinstall. This is meant to be (eventually in conjunction with
pc-sysinstall) a replacement for sysinstall in the 9.0 release and beyond.
Currently supported platforms are sparc64, pc98, i386, amd64, powerpc, and
powerpc64. Integration into the build system will occur in the coming
weeks.

Merging with pc-sysinstall will use this code as a frontend, while
temporarily retaining the interactive partition editor here. This work
will be done in parallel with improvements on this code and release
integration.

Thanks to all who have provided testing and comments!