- Copy stable/10@285827 to releng/10.2 in preparation for 10.2-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.2.
- Update default pkg(8) configuration to use the quarterly branch.[1]

Discussed with: re, portmgr [1]
Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r285427:
Do not mount /var/log and /var/tmp as md(4)-backed devices.

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

MFC r284004 (parital):
Use the pw(8) '-R' flag to change the relative root directory
when creating operating within the DESTDIR.

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

MFC r283896:
In arm_create_disk(), disable soft updates journaling.

Disabling soft updates journaling appears to resolve issues
with kernel panics, and may also be generally bad to have
enabled for SD cards.

Sponsored by: The FreeBSD Foundation

MFC r283894, r283895, r283913, r284004, r284010:

r283894 [1]:
Disable arm_create_user().

r283895 [1]:
Re-enable arm_create_user(), and pass the '-V DESTDIR/etc' to
pw(8) to set the correct /etc directory for the user/group
files.

r283913:
Pass the '-b' argument to pw(8) so the '/home' directory is
created in the correct place.

r284004:
Make sure /home exists within the DESTDIR before creating the
'freebsd' user account.

r284010 [2]:
Work around a potential bug in pw(8) when '-m' is specified.

[1] For recording merge history only.
[2] This commit post-dates the pw(8) '-R' addition in head/,
which is needed for conflict resolution from r284004.

Sponsored by: The FreeBSD Foundation

MFC r282500, r282693:
r282500:
Add initial support for building RPI2 images.

In release.sh, allow overriding buildenv_setup() before
the handoff to arm/release.sh.

Copy arm/RPI-B.conf -> arm/RPI2.conf, set UBOOT_PORT and
the correct KERNEL, and add the buildenv_setup() override
to install the sysutils/u-boot-rpi2 port/package.

Copy tools/arm/crochet-RPI-B.conf -> tools/arm/crochet-RPI2.conf,
and set the correct entries for the RaspberryPi2 board.

r282693:
Merge ^/projects/release-arm-redux into ^/head.

Of note:

- This commit adds native FreeBSD/arm release build support without
requiring out-of-tree utilities.

- Part of this merge removes the WANDBOARD-{SOLO,DUAL,QUAD} kernel
configuration files, for which the IMX6 kernel configuration file
should be used instead.

- The resulting images have a 'freebsd' user (password 'freebsd'),
to allow ssh(1) access when console access is not available (VGA
or serial). The default 'root' user password is set to 'root'.

- The /etc/ttys file for arm images now enable both ttyv0 and ttyu0
by default.

Note: The RPI2 kernel configuration does not yet exist in stable/10,
however the merge conflicts needed to be properly resolved.
Additionally, SRCBRANCH has been set to base/stable/10 in the updated
arm configuration files as part of this commit.

Sponsored by: The FreeBSD Foundation

Merge ^/projects/release-arm-redux into ^/head.

Of note:

- This commit adds native FreeBSD/arm release build support without
requiring out-of-tree utilities.

- Part of this merge removes the WANDBOARD-{SOLO,DUAL,QUAD} kernel
configuration files, for which the IMX6 kernel configuration file
should be used instead.

- The resulting images have a 'freebsd' user (password 'freebsd'),
to allow ssh(1) access when console access is not available (VGA
or serial). The default 'root' user password is set to 'root'.

- The /etc/ttys file for arm images now enable both ttyv0 and ttyu0
by default.

Help from: many (boot testing, feedback, etc.)
Sponsored by: The FreeBSD Foundation

Add tools/arm.subr to contain common subroutines used for
building arm images. This is similar to tools/vmimage.subr
used for building virtual machine disk images. By default,
only arm_create_disk() and arm_install_base() contain real
functionality here, and arm_install_uboot() must be overridden
in the arm/KERNEL.conf file.

In release.sh, make create_arm_armv6_build_release() do
something now.

In arm/BEAGLEBONE.conf, set IMAGE_SIZE, PART_SCHEME, FAT_SIZE,
FAT_TYPE, and MD_ARGS, as well as make arm_install_uboot()
functional.

Parts of this were taken from disecting a previous BEAGLEBONE
image, and other parts obtained from Crochet sources.

Sponsored by: The FreeBSD Foundation