The overhead of Zend_Cache in manifests is too high - we don't
need LRU or tags, just somewhere to dump a bunch of data that
persists
You can replace the class used by defining SS_MANIFESTCACHE
to be a class that implements the ManifestCache interface
(we can't use the Config system to set this, as it isn't
initialised yet).
It shouldnt be possible to get ConfigStaticManifest to parse
a user uploaded file, and if you could it shouldnt be possible
to form PHP that token_get_all could parse which would end
up executing any code.
However just in case it is, this changes the eval to assign to a
static, so the eval will give a syntax error if an attacker
manages to make $value look like `ls` or some other expression