- 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

MFH (r276605, r282089): upgrade to latest Unbound
MFH (r276699, r276702, r277057): local control socket
MFH (r276599, r276612, r282087, r282088): build fixes

This brings in Unbound 1.5.3 from head. Local control sockets are now
supported and will be used by default for new installations. Existing
systems will continue to use TCP control sockets until the automated
setup script is re-run ("service local_unbound setup") and the service
restarted ("service local_unbound restart").

Approved by: re (kib)
Relnotes: yes

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

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

Set props and correct RCS ID tag.

Approved by: re (blanket)

Add unbound-control.

Approved by: re (blanket)

Two helper scripts for porting Unbound:

- freebsd-configure.sh runs ./configure with the correct parameters
and regenerates the lex and yacc code.

- freebsd-sources.pl untangles the upstream Makefile and generates
source lists for our Makefiles.

Approved by: re (blanket)