mitchellh/vagrant — pull request #2581 by phinze (2013-12-04 15:39:02+00:00)
Title: commands/ssh-config: fix for multiple private keys

since we merged multiple private keys, the :private_key_path item of
ssh_info now comes back as an array. the ssh-config command had not yet
been updated to handle this properly.

here we fix that oversight and add a few unit tests around the config
generation.