- 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 (r261320): upgrade openssh to 6.5p1
MFH (r261340): enable sandboxing by default

Upgrade to OpenSSH 6.5p1.

Vendor import of OpenSSH 6.5p1.