zope.conf is read quite lite during zope startup and some modules are using
environment variables to be set up (like DateTime) *before* zope.conf is read.

Need to allow from www.owlfish.com, as WSGIUtils is available there.

On each zope, configure the zodb_cache_size and zeo_client_cache_size

Goal is to make it smaller to be more readable

Event log to info allows to extract usefull informations for reporting.

Slow system is not a valid state, so, fail early.

This is mandatory for PCI compliancy.

Force acl usage on apache backend.

Needed for PCI compliancy.