This directory contains an "instance home" for the Zope application
server.  It contains the following directories:

  bin/         Scripts used to control the Zope instance
  Extensions/  Python sources for External Methods
  Products/    Installed products specific to the instance
  var/         Run-time data files, including the object database

In PLD some files are placed outside "instance home":

  /etc/zope/$instance_name      Configuration files
  /var/log/zope/$instance_name  Log files
