Revert "manually add siteCache.idx.php to gitignore"

This reverts commit 8828ce82bb04a0b6b495f854575f386f4a107328.
Revert "Revert "manually add siteCache.idx.php to gitignore""

This reverts commit 2fbba2aa5b5d3bf2728080280e5e62356c0e145d.
Revert "Revert "Revert "manually add siteCache.idx.php to gitignore"""

This reverts commit f8f066ec8879cae2fcc65fbeb15781448307d384.