- 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

Final whitespace trim.

Make sure we use REDUCE32 on the result of do_cksum(), as in_cksum_skip()
expects this. If we do not, this could result in wrong checksums.

MFC after: 1 day

MFp4: Forget the asm inlined version of in_cksum_hdr(). It doesn't work if
the pointer is unaligned, and it just doesn't worth it.

asm versions of in_cksum_hdr() and in_pseudo().

Use asm versions of in_cksum() and friends.

Handle endianness correctly.

Spotted out by: jmg

Start all license statements with /*-

Import FreeBSD/arm kernel bits.
It only supports sa1110 (on simics) right now, but xscale support should come
soon.
Some of the initial work has been provided by :
Stephane Potvin <sepotvin at videotron.ca>
Most of this comes from NetBSD.