261d0ef6cd
This is a new built-in middleware that is more robust for waiting for boots. The "max_tries" configuration is now gone, it is timeout based. Future commits will make this even better as the SSH communicator will implement the new "wait_for_ready" in a better way.
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.