- 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

Disconnect installation notes from the release documentation build.

Approved by: re (blanket for installation notes removal)

Reflect that the hardware notes article is now a MI document.

Teach release builds and release documentation snapshots that release
notes are no longer MD documents.

Add the bones for PowerPC release documentation. This has been
derived from ia64.

Don't try to upload alpha-specific docs anymore.

When building release documentation for release builds or for
release documentation snapshots, force URLS_ABSOLUTE. This
allows us to relocate HTML renderings anywhere without worrying
about breaking relative links to pages on the Web site. This can
happen when we use &base; as part of a URL.

I wonder if we should do this for all release documentation builds,
but I'm not quite sure what all the cases are.

Since early-adopter has been disconnected from the build, don't try
to install it to a RELNOTESng snapshot.

Commit amd64 MD release documentation stubs and hook up to the build.
Content will be filled in later as needed, but this should unbreak
the doc part of an amd64 release build.

Requested by: peter

Add ia64 documents to RELNOTESng snapshot.

Include the pc98 installation document in the RELNOTESng snapshot
page.

Hook up early-adopter article to RELNOTESng build.

pc98 now has its own relnotes and hardware documents.

Activate the sparc64 installation document.

New release notes: bge(4), ng_gif(4), ng_gif_demux(4), ng_ip_input(4),
tftpd(8) support for RFC 2349.

Add a sample Makefile as an example of building RELNOTESng for
the release documentation snapshot page.