tests pass, better parsing

contrib/codecs/http/codec.go

contrib/codecs/inproc/client.go

contrib/codecs/inproc/inproc.go

contrib/codecs/rdwr/client.go

contrib/codecs/rdwr/codec.go

pkg/clientutil/idreply.go

pkg/clientutil/idreply_test.go

pkg/codec/json.go

pkg/codec/json_test.go

pkg/codec/transport.go

pkg/codec/wire.go

pkg/server/server.go

pkg/serverutil/msg.go