[FEATURE] Introduce xcache cache backend

Project: TYPO3v4/Core
Branch: master
Patchset: 1
ID: I4e9e856a8397978eb6f6d480b79996ff49ff8a7b
Author: Philipp Gampe

URL: https://review.typo3.org/18823

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The TYPO3 review process is maintained by [Gerrit Code Review](https://review.typo3.org/).
For further information to this pull request please have a look at the original one: https://review.typo3.org/18823

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