mitchellh/boot2docker-vagrant-box — pull request #67 by dduportal (2014-10-26 07:16:19+00:00)
Title: Adding auto correction for the docker NAT port 

Hi !

Adding the auto_correct option will protect against these cases :
* A docker daemon is running on the same host running the VM
* When running multiples instance of the VM (i met this issue when trying to simulate a multi docker host setup)