cmd/go: suppress extraneous newlines in list

Before:
$ go list -f '{{range .Deps}}{{println $.Name .}}{{end}}' math time
math runtime
math unsafe

time errors
time runtime
time sync
time sync/atomic
time syscall
time unsafe

$

After:
$ go list -f '{{range .Deps}}{{println $.Name .}}{{end}}' math time
math runtime
math unsafe
time errors
time runtime
time sync
time sync/atomic
time syscall
time unsafe
$

R=minux.ma, rsc
CC=golang-dev
https://codereview.appspot.com/7130052

Committer: Russ Cox <rsc@golang.org>
encoding/xml: simplify copyValue

Delete various complications left over from an earlier reflect API.

R=golang-dev, bradfitz
CC=golang-dev
https://codereview.appspot.com/7124063
net: don't return nil interface address on netbsd

On NetBSD routing sockaddrs for interface address contain sockaddr_dl.

R=dave, rsc
CC=golang-dev
https://codereview.appspot.com/7085064