mitchellh/vagrant — pull request #2873 by mpalmer (2014-01-22 01:26:39+00:00)
Title: Avoid nuking synced folders which specify the default impl

If two synced folders are specified, one of which explicitly sets its type
to be the same as the default implementation which is later selected, the
folder which relies on the implicit selection of an implementation will
overwrite the one that was explicit in its desires.