- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.3.
- Update default pkg(8) configuration to use the quarterly branch.

Approved by: re (implicit)

MFC r281169, r293724, r293796, r294029, r294041, r294058

MFC r281169 (by andrew):
Make global variabled only used in this file static

MFC r294058:
Make common boot file_loadraw name parameter const

MFC r294041:
Remove unused reg param from fdt_fixup_memory

MFC r293724:
Enable warnings in EFI boot code

MFC r293796:
Fix typo in libefi.c

MFC r294029:
Only build EFI components on supported compilers

Sponsored by: Multiplay

MFC: r256940

Allow users to set UUID in network byte order regardless of SMBIOS version.

MFC: r277949:
New function smbios_match to detect BIOS versions during boot

MFC: r277957:
Fix order of functions in smbios.c (corrects r277949)

MFC: r281138:
SMBIOS support for EFI

r281138 makes changes to the new unified EFI loader (r280950), which has not been merged to stable/10 (and likely won't be).
These changes were manually applied to the amd64 EFI loader (sys/boot/amd64/efi).
The changes to sys/boot/amd64/efi are a direct commit.

Reviewed by: stas
Approved by: re (gjb), marcel
Sponsored by: ScaleEngine Inc.
Differential Revision: https://reviews.freebsd.org/D3129

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Rewrite SMBIOS for loader:

- First three fields of system UUID may be little-endian as described in
SMBIOS Specification v2.6. For now, we keep the network byte order for
backward compatibility (and consistency with popular dmidecode tool)
if SMBIOS table revision is less than 2.6. However, little-endian format
can be forced by defining BOOT_LITTLE_ENDIAN_UUID from make.conf(5) if it
is necessary.
- Replace overly ambitious optimizations with more readable code.
- Update comments to SMBIOS Specification v2.6 and clean up style(9) bugs.

Increase sprintf(3) buffer size, which I forgot from the previous commit.

Probe size of installed memory modules from loader and display it
as 'real memory' instead of Maxmem if the value is available.
Note amd64 displayed physmem as 'usable memory' since machdep.c r1.640
to unconfuse users. Now it is consistent across amd64 and i386 again.
While I am here, clean up smbios.c a bit and update copyright date.

Reviewed by: jhb

Use lower cases for UUID string to conform RFC4122 and ISO/IEC-9834-8:2005.

Export SMBIOS serial numbers by default. To turn it off, use
'BOOT_HIDE_SERIAL_NUMBERS' knob.

Suggested by: ceri

Micro-optimize invalid UUID check.

- Implement serial numbers, UUID, and asset tag (turned off by default).
Use 'BOOT_SENSITIVE_INFO=YES' variable to turn them on.
- Use 'uint*_t' instead of 'u_int*_t', correct compilation warnings, and
update copyright while I am here.

Export processor socket information. New environment variables are:

smbios.socket.enabled: number of enabled sockets
smbios.socket.populated: number of populated sockets

Simplify SMBIOS loader variables and drop `hint.smbios.0.enabled'.

They are not real hints.

Reported by: des
Pointed out by: peter
Approved by: anholt (mentor)

Scan static SMBIOS structures and export the following environment
variables to loader:

hint.smbios.0.enabled "YES" when SMBIOS is detected

hint.smbios.0.bios.vendor BIOS vendor
hint.smbios.0.bios.version BIOS version
hint.smbios.0.bios.reldate BIOS release date

hint.smbios.0.system.maker System manufacturer
hint.smbios.0.system.product System product name
hint.smbios.0.system.version System version number

hint.smbios.0.planar.maker Base board manufacturer
hint.smbios.0.planar.product Base board product name
hint.smbios.0.planar.version Base board version number

hint.smbios.0.chassis.maker Enclosure manufacturer
hint.smbios.0.chassis.version Enclosure version

These strings can be used to detect hardware quirks and to set appropriate
flags. For example, Compaq R3000 series and some HP laptops require

hint.atkbd.0.flags="0x9"

to boot. See amd64/67745 for more detail.

Note: Please do not abuse this feature to resolve general problem when it
can be fixed programmatically. This must be used as a last resort.

PR: kern/81449
Approved by: anholt (mentor)