Add a deprecation error for the old style of configuring host only networks

lib/vagrant/config/vm.rb

@@ -49,6 +49,19 @@ module Vagrant
       end
 
       def network(type, *args)
+        if !type.kind_of?(Symbol)
+          raise Errors::DeprecationError, :message => <<-MESSAGE
+`config.vm.network` changed in 0.9.0 where the first argument is
+now the type of network and the remaining arguments are options for
+that type. For example, host only networks are now configured like
+so:
+
+    config.vm.network :hostonly, "172.24.24.24"
+
+Please change your configurations to match this new syntax.
+          MESSAGE
+        end
+
         @networks << [type, args]
       end
 

templates/locales/en.yml

@@ -35,7 +35,6 @@ en:
         You are using a feature that has been removed in this version. Explanation:
 
         %{message}
-
         Note that this error message will not appear in the next version of Vagrant.
       dotfile_is_directory: |-
         The local file Vagrant uses to store data ".vagrant" already exists