Force acl usage on apache backend.

Needed for PCI compliancy.

It allows to run erp5testnode.

It is already done by erp5 software.

4.37 is not available anymore.

This will allow to run test as other project.

This completely remove interest of git, which allow to track
modification/conflicts from upstream.

This reverts commit b3df1d75.

Such trick is not needed anymore, as in sanef/software.cfg uses sanef-erp5
repository clone.

From original changelog:

- Fixed a serious privilege escalation issue. For more information see:
  http://plone.org/products/plone/security/advisories/20110622

Only firewall prevents the world to access it!

Based on maatkit results.