- 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

MFC r269865:
Bring the md5 functions into libc for internal use only.
It is required to support ID randomization for our stub
resolver.

Bring the md5 functions into libc for internal use only.
It is required to support ID randomization for our stub
resolver.