VirtualBox Beta 5.0.21-107545 & 4.3.32-103443 (#2122)

- Amend `url` stanza
- Add `auto_updates` stanza
- Add `zap` stanza

Casks/virtualbox-beta.rb

@@ -1,16 +1,29 @@
 cask 'virtualbox-beta' do
-  version '5.0.21-107302'
-  sha256 'f670826547df8357d3c9098985ac620d5aa8959b85d0d888543f0404f3247663'
+  if MacOS.release <= :lion
+    version '4.3.32-103443'
+    sha256 '08defbf310b7ba5852fa8dd951438bb9b1528bb1544211568861986110e807f7'
+  else
+    version '5.0.21-107545'
+    sha256 '5b6e74e99daf72d2f67d5bf588d314be4d0b2086f8af9ee66b58e16ce80d6a45'
+  end
 
-  url "http://download.virtualbox.org/virtualbox/#{version.split('-')[0]}/VirtualBox-#{version}-OSX.dmg"
+  url "https://virtualbox.org/download/testcase/VirtualBox-#{version}-OSX.dmg"
   name 'Oracle VirtualBox'
   homepage 'https://www.virtualbox.org/wiki/Testbuilds'
   license :gpl
 
+  auto_updates true
+
   pkg 'VirtualBox.pkg'
   binary '/Applications/VirtualBox.app/Contents/MacOS/VBoxManage'
   binary '/Applications/VirtualBox.app/Contents/MacOS/VBoxHeadless'
 
   uninstall script:  { executable: 'VirtualBox_Uninstall.tool', args: %w[--unattended] },
             pkgutil: 'org.virtualbox.pkg.*'
+
+  zap delete: [
+                '/Library/Application Support/VirtualBox',
+                '~/Library/VirtualBox',
+              ],
+      rmdir:  '~/VirtualBox VMs'
 end