- 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

It seems the pre-commit checker doesn't detect illegal character sets. Fix.

Give up on using iconv to convert to UTF-8 at build time. I don't see any
practical way to make iconv(1) as a build tool. Instead pre-convert.
This gives us UTF-8 nvi catalogs even on systems without iconv enabled.