Adds a form to manually submit an email to the mail handler.

Use GET /mail_handler?key= to get the form.

git-svn-id: http://svn.redmine.org/redmine/trunk@14314 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/integration/routing/mail_handler_test.rb

@@ -19,6 +19,7 @@ require File.expand_path('../../../test_helper', __FILE__)
 
 class RoutingMailHandlerTest < Redmine::RoutingTest
   def test_mail_handler
+    should_route 'GET /mail_handler' => 'mail_handler#new'
     should_route 'POST /mail_handler' => 'mail_handler#index'
   end
 end