Fix API docblock CS errors.
Fix doc comment errors in Acl classes.
Fix the test suite package doc block errors.
Remove dead, untested and unreachable code in FormHelper.

Closes #3650
Fix doc errors in Component/Acl.
Fix api doc errors in TestSuite/
Update datasource API docs.
Remove lies from API docblock for BasicAuthenticate class.

Add info on how to configure for cookieless/stateless operation without redirection.
Fix api docblocks for behaviors.
Fix typo
Refactor translation functions arguments handeling
Merge branch 'i18n-context-2.6' of github.com:MMS-Projects/cakephp into i18n-context-2.6