- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

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

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

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

Remove duplicated GEOM_PART_* options.

PR: 170931
Approved by: adrian

This isn't required any longer - it turns out the flash
has ~ 1.7MB of space for a kernel. There's thus plenty of
space for a full, non-module kernel.

Use geom_uncompress now, rather than geom_uzip.

This results in a much smaller rootfs image and it easily
fits in the 8MB flash.

Add a configuration file for the Atheros PB47 reference board.
This is an AR71xx based board with 8MB flash, 64MB RAM, a
Mini-PCI+ slot (see below) and a single 10/100/1000baseT
ethernet port. It also has two USB ports.

This is an easier board than most to add as it doesn't have a
switch PHY on-board. This made it (mostly) trivial to craft a
working configuration.

Things to note:

* This, like most other reference boards, use uboot rather then
redboot. It means that you typically have to manually flash
both the kernel and rootfs partitions.

* Since there's currently no (nice) way to extract out the
ethernet MAC and RAM from the uboot environment, the RAM
will default to 32mb and the MAC will be something very
incorrect. I'll try to fix this up in a subsequent commit
or two, even if it's just some hard-coded nonsense in
ar71xx_machdep.c for now.

* The board is designed for a specific model of mini-PCI+
NIC which never made it into production. Normal mini-PCI
NICs will work fine; if you happen to have the NIC in question
then it will work fine with this board.