Added specific support for Debian 8 (aka jessie) to permit proper vagrant halt execution

plugins/guests/debian/guest.rb

@@ -2,7 +2,7 @@ module VagrantPlugins
   module GuestDebian
     class Guest < Vagrant.plugin("2", :guest)
       def detect?(machine)
-        machine.communicate.test("cat /etc/issue | grep 'Debian'")
+        machine.communicate.test("cat /etc/issue | grep 'Debian' | grep -v '8'")
       end
     end
   end

plugins/guests/debian8/cap/halt.rb

@@ -0,0 +1,16 @@
+module VagrantPlugins
+  module GuestDebian8
+    module Cap
+      class Halt
+        def self.halt(machine)
+          begin
+            machine.communicate.sudo("shutdown -h -H")
+          rescue IOError
+            # Do nothing, because it probably means the machine shut down
+            # and SSH connection was lost.
+          end
+        end
+      end
+    end
+  end
+end

plugins/guests/debian8/guest.rb

@@ -0,0 +1,9 @@
+module VagrantPlugins
+  module GuestDebian8
+    class Guest < Vagrant.plugin("2", :guest)
+      def detect?(machine)
+        machine.communicate.test("cat /etc/issue | grep 'Debian' | grep '8'")
+      end
+    end
+  end
+end

plugins/guests/debian8/plugin.rb

@@ -0,0 +1,21 @@
+require "vagrant"
+
+module VagrantPlugins
+  module GuestDebian8
+    class Plugin < Vagrant.plugin("2")
+      name "Debian Jessie guest"
+      description "Debian Jessie guest support."
+
+      guest("debian8", "debian") do
+        require File.expand_path("../guest", __FILE__)
+        Guest
+      end
+      
+      guest_capability("debian8", "halt") do
+        require_relative "cap/halt"
+        Cap::Halt
+      end
+      
+    end
+  end
+end