mitchellh/vagrant — pull request #1768 by hwartig (2013-05-25 13:27:14+00:00)
Title: Ignore nfs option for vm.sync_folder on windows.

This patch will change the sync_folder behavior to the one described in
the [documentation](http://docs.vagrantup.com/v2/synced-folders/nfs.html).
Without that patch windows users will get an error when `nfs: true` is
set for a shared folder.

This solves #1748 .