tknerr/vagrant-managed-servers — pull request #15 by elyast (2014-02-10 00:22:04+00:00)
Title: fixing rsync command

Options for ssh_private_key has changed slightly in vagrant 1.4, therefore I think it should be adjusted (like in vagrant-aws)

Second thing is vagrant 1.4.3 added proxy_command to ssh config and therefore its needed in rsync, otherwise it will fail when the managed server is behind hop server