move test/acceptance to test/acceptance_old
Add missing argument to ProviderVirtualBox::SyncedFolder#driver call

GH-2577 missed passing the `machine` to the `driver` method.
Merge pull request #2586 from tmatilai/2577-synced-folder

provider/virtualbox: add missing argument to ProviderVirtualBox::SyncedFolder#driver call
fixed broken link
Merge pull request #2593 from bennlich/patch-1

fixed broken link on configuration version page
[provisioner/chef]: Update base to fix typo.

It seems this was introduced by accident with #2281.
Merge pull request #2594 from johnbellone/patch-1

provisioner/chef: Update base to fix typo.
Merge branch 'master' of github.com:mitchellh/vagrant