exp/ssh: fix unmarshal test
exp/ssh: fix unmarshal test

Ensure that empty NameLists always return
a zero length []string, not nil.

In practice NameLists are only used in a few
message types and always consumed by a for
range function so the difference between nil
and []string{} is not significant.

Also, add exp/ssh to pkg/Makefile as suggested
by rsc.

R=rsc, agl
CC=golang-dev
http://codereview.appspot.com/5400042

Committer: Adam Langley <db68fba232b2c49ed3e9d3081df349dde7b61dfd@golang.org>
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go