cmd/link: "-X name value" form gone (CL 19614)
cmd/compile: smaller binaries (many CLs)
cmd/go, go/build: add support for Fortran (CL 19670, CL 4114)
-cmd/dist: introduce list subcommand to list all supported platforms (CL 19837)
cmd/doc: group constructors with types (CL 22354)
+cmd/go, go/build: binary-only package support (CL 22433)
Ports:
We now require OpenBSD 5.6+ (CL 18219, crypto/rand using getentropy)
plan9/arm support? Start at least.
+cgo and external linking support for linux/mips64 and linux/mips64le (CL 19809, ...)
New packages: