add support for the libvirt vagrant provider

Vagrantfile

@@ -1,12 +1,24 @@
 Vagrant.configure(2) do |config|
   config.vm.box = "windows-2016-amd64" # see https://github.com/rgl/windows-2016-vagrant
+
+  config.vm.provider "libvirt" do |lv, config|
+    lv.memory = 4096
+    lv.cpus = 2
+    lv.cpu_mode = "host-passthrough"
+    # lv.nested = true
+    lv.keymap = "pt"
+    config.vm.synced_folder ".", "/vagrant", type: "smb", smb_username: ENV["USER"], smb_password: ENV["VAGRANT_SMB_PASSWORD"]
+  end
+
   config.vm.provider "virtualbox" do |vb|
     vb.linked_clone = true
     vb.memory = 4096
+    vb.cpus = 2
     vb.customize ["modifyvm", :id, "--vram", 64]
     vb.customize ["modifyvm", :id, "--clipboard", "bidirectional"]
     vb.customize ["modifyvm", :id, "--draganddrop", "bidirectional"]
   end
+
   config.vm.provision "shell", inline: "$env:chocolateyVersion='0.10.11'; iwr https://chocolatey.org/install.ps1 -UseBasicParsing | iex", name: "Install Chocolatey"
   config.vm.provision "shell", path: "Vagrantfile-locale.ps1"
   config.vm.provision "shell", path: "Vagrantfile-provision.ps1"