This commit contains two fixes: - The Chef provisioner was incorrectly referencing config.ssh.username instead of machine.ssh_info[:username]. With the new change to default ssh configuration, if a user had not set config.ssh.username, provisioning would fail. - The shell provisioner was not appropriately changing permissions to the upload path. If a different ssh user attempted to use a shell provisioner, provisioning would fail. The same case applied to the Chef provisioner -- while permissions were being reset, they were not done recursively.
Vagrant Core Plugins
These are plugins that ship with Vagrant. Vagrant core uses its own plugin system to power a lot of the core pieces that ship with Vagrant. Each plugin will have its own README which explains its specific role.