Adds support for multiselect custom fields (#1189).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@8721 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/20120127174243_add_custom_fields_multiple.rb

@@ -0,0 +1,9 @@
+class AddCustomFieldsMultiple < ActiveRecord::Migration
+  def self.up
+    add_column :custom_fields, :multiple, :boolean, :default => false
+  end
+
+  def self.down
+    remove_column :custom_fields, :multiple
+  end
+end