mitchellh/vagrant — pull request #3596 by sneal (2014-05-01 14:53:12+00:00)
Title: Removed unused Solaris and SmartOS halt config properties

These config properties were removed or replaced by graceful_halt_timeout in a prior release of Vagrant.

I don't have a Solaris box so I couldn't try this out, but there are no usages of these config properties inside Vagrant itself.