- 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

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

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

supports SPROM rev8 informations properly which are used to support
low-power PHY of bwn(4) and LDO voltage adjustments.

Adds siba_bwn module which is used with bwn(4). Main purpose of this
module is to distinguish parts of Silicon Backplane and of Broadcom
Wireless.

Support for the siba bus found in many broadcom products.

Submitted by: bms@
Obtained from: p4 mips branch