Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

bsdinstall: allow whitelabeling the installer

Override OSNAME to change the name of the OS in the installer.

This is a first step, the shell changes will be separate.

Reviewed by: allanjude
Approved by: allanjude
Differential Revision: https://reviews.freebsd.org/D34878
Sponsored by: Rubicon Communications, LLC ("Netgate")

bsdinstall: Drop vestigial bsdinstall-esps cleanup

This is not needed after 0b7472b3d8d2f1e90fade5236b44fd98d8e396c2.

MFC after: 3 days
Sponsored by: iXsystems, Inc.
Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D29325

Add a new mode to the scripted partition editor for variant disk names.

If the disk parameter "DEFAULT" is set in place of an actual device name,
or no disk is specified for the PARTITIONS parameter, the installer will
follow the logic used in the automatic-partitioning mode, in which it
will either provide a selection dialog for one of several disks if
several are present or automatically select it if there is only one. This
simplifies the creation of fully-automatic installation media for
hardware or VMs with varying disk names.

Suggested by: Egoitz Aurrekoetxea <egoitz@sarenet.es>
MFC after: 3 weeks
Relnotes: yes

bsdinstall: Use TMPDIR if set

Submitted by: Ryan Moeller <ryan@freqlabs.com>
Reviewed by: bcran, Nick Wolff <darkfiberiru@gmail.com>
Differential Revision: https://reviews.freebsd.org/D22979/

Support mounted boot partitions in the installer. This allows the platform
layer, for example, to specify that the EFI boot partition should be
mounted at /efi and formatted normally with newfs_msdos rather than
splatted to from /boot/boot1.efifat.

This commit adds only the API for this; actual platform use will come later.

various: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.

Add support for two workarounds for known issues booting GPT in legacy mode on some hardware

For Lenovo laptops with buggy bios (x220, t420, t520):
Write the 0xee entry into the second slot in the pmbr instead of the first

For some Dell and HP models:
The BIOS gives a warning message when booting in legacy mode from a GPT partitioned disk where the 0xee partition in the pmbr is not flagged active
For models known to have this problem, mark the pmbr active during installation

Use smbios data to identify machines known to be affected by any of the above, and offer the user the option to apply the workaround

In bsdinstall's ufs auto mode (autopart partition wizard):
Allow users to select which type of partition table to use
Keep current defaults: MBR for BIOS, GPT for UEFI
This allows users to choose GPT for legacy boot if they wish

PR: 184910
PR: 194359
Reviewed by: Michael Dexter
Approved by: marcel
MFC after: 3 days
X-MFC-With: r285594
Relnotes: yes
Sponsored by: ScaleEngine Inc.
Differential Revision: https://reviews.freebsd.org/D3091

Add ZFS support to the bsdinstall partition editor and sade.

Submitted by: Kurt Lidl (original version)
MFC after: 6 weeks

Add EFI support to the installer. This requires that the kernel provide
a sysctl to determine what firmware is in use. This sysctl does not exist
yet, so the following blocks are in front of the wheels:
- I've provisionally called this "hw.platform" after the equivalent thing
on PPC
- The logic to check the sysctl is short-circuited to always choose BIOS.
There's a comment in the top of the file about how to turn this off.

If IA64 acquired a boot1.efifat-like thing (probably with very few
modifications), the same code could be adapted there.

If no partition configuration is specified in {}, use the automatic setup
the interactive installer uses.

Example: bsdinstall scriptedpart ada0
Result: Use entire disk for a FreeBSD system with default partition layout

Add a simple scripted partitioner. Documentation and more scripting support
will come soon. This lets the install process have a line like:

bsdinstall scriptedpart 'ada0 GPT {1.5G freebsd-ufs /, 10G freebsd-swap,
auto freebsd-ufs /usr}'

to set up a system with a 1.5GB /, some swap space, and a /usr using the
rest of ada0.

MFC after: 1 month

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.

MFC after: 3 days

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.

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!