where is the railties folder in rails 2.3.9

I'm trying to go through the codes of a rails 2.3.9 application. I expect to have railties folder in app_root/vendor/rails/railties/ but I don't have this directory. In vendor directory I just have plugins directory. Where is this railties directory supposed to be?

I want to change the default 开发者_运维问答port for the application but also go through the files needed for boot process

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I don't recall there being an app-local railties folder back in Rails 2.3.

Port configuration was handled differently; it was in the server script itself, hardcoded in an options hash--I always just modified that.