bytes: clarify Equal docs

== isn't defined on slices, so don't use it in docs.

R=golang-dev, iant
CC=golang-dev
https://codereview.appspot.com/12983045
syscall: update routing socket parser for NetBSD 6 and beyond

NetBSD 6 kernel and beyond require 64-bit aligned access to routing
facilities.

Fixes issue 6226.

R=golang-dev, bsiegert, bradfitz
CC=golang-dev
https://codereview.appspot.com/13170043