ansible/ansible — pull request #3343 by j2sol (2013-06-25 17:40:15+00:00)
Title: add_host should not be a changed action

The action doesn't actually change anything on a system, so setting the
status to changed is wrong. add_host is much like set_fact in that
regard.

Since changed is False by default, there is no need to explicity set it,
so just create an empty dict for result and add to it from there.