runtime/race: support freebsd
go get: Support for IBM DevOps Services (hub.jazz.net) git repos
cmd/go/doc: Fix example domain
cmd/go: add go generate
cmd/go: add missing doc for GOOS and GOARCH

https://code.google.com/p/go/source/browse/src/cmd/go/doc.go?r=528863ac401ff24391b01bbaf88080e5b85c0534
Merge pull request #69 from t-yuki/master

cmd/go: update doc.go to tip