sfFrontWebController:
sfFrontWebController allows you to centralize your entry point in your web
application, but at the same time allow for any module and action
combination to be requested.
sfRouting:
sfRouting class controls the creation of URLs and parses URLs. It maps an
array of parameters to URLs definition.
sfWebController:
sfWebController provides web specific methods to sfController such as, url
redirection.
