Zend_Cache: TwoLevels backend properties visibility is changed to 'protected'. ZF-8430.
Zend_Cache: TwoLevels backend properties visibility is changed to 'protected'. ZF-8430.

git-svn-id: abaeb2b3ba5a94ed391a9405ad7d63d0414021c9@19787 44c647ce-9c0f-0410-b52a-842ac1e357ba

jupeter/zf1,jupeter/zf1,jupeter/zf1,svn2github/zend_framework,svn2github/zend_framework,svn2github/zend_framework,tjohns/zf,tjohns/zf,svn2github/zend_framework,svn2github/zend_framework,tjohns/zf