mitchellh/vagrant — pull request #3783 by YungSang (2014-05-13 22:11:31+00:00)
Title: Set disabled even if no disabled option

to override the previous settings

Vagrantfile in a box
```ruby
config.vm.synced_folder ".", "/vagrant", disabled: true
```

User's Vagrantfile
```ruby
config.vm.synced_folder ".", "/vagrant", type: "nfs"
```