Ensure referrer is saved in session even when AuthComponent::$loginRedirect is set.
Clarified redirectUrl() docblock.
Avoid unnecessary calls to ConnectionManager::enumConnectionObjects() in ClassRegistry::init().
Closes #3724
Merge pull request #1200 from ADmad/2.3-classregistry

Avoid unnecessary calls to ConnectionManager::enumConnectionObjects() in...
Add missing App::uses() to avoid fatal error
Merge pull request #1201 from cakephp/master-app-uses

Add missing App::uses() to avoid fatal error