Minor fixes

1) WEBrick should respond to TERM signals
(needed by MacOSX and, perhaps, others).
2) HTTP redirects for redirected pages should be 301's.
3) Add a flash message for redirection to "new" page
when the target of "show" action is not found.

vendor/rails/actionpack/lib/action_controller/vendor/rack-1.0/rack/handler/webrick.rb

@@ -9,6 +9,7 @@ module Rack
         server = ::WEBrick::HTTPServer.new(options)
         server.mount "/", Rack::Handler::WEBrick, app
         trap(:INT) { server.shutdown }
+        trap(:TERM) { server.shutdown }
         yield server  if block_given?
         server.start
       end