- 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

Add missing #include
Bump WARNS level to 2

PR: bin/71668
Submitted by: Dan Lukes <dan@obluda.cz>
MFC after: 3 days

Update Bluetooth code.

Reviewed by: M. Warner Losh <imp@bsdimp.com>; John Hay <jhay@freebsd.org>
Approved by: M. Warner Losh <imp@bsdimp.com> (mentor)

Account for the fact that "buildworld" builds in the 'obj' tree
Pointed out by: Andrew Gallatin <gallatin@cs.duke.edu>

Part 2 of the commit if new bluetooth code.
Submitted by: Maksim Yevmenkin <m_evmenkin@yahoo.com>
Approved by: re@