Wrap a require_once so its done in 4.5 and 4.7 only to improve 6.1 compatibility

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/enetcache/trunk@77209 735d13b6-9817-0410-8766-e36946ffe9aa
Raise core dependency statement in ext_emconf to include 6.1.x

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/enetcache/trunk@77210 735d13b6-9817-0410-8766-e36946ffe9aa
Release version 1.1.1

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/enetcache/trunk@77211 735d13b6-9817-0410-8766-e36946ffe9aa