Specify the number of Interchange servers to start when running
in PreFork mode.
The maximum value allowed is 50.
The default is "0".
This directive is only available for use in the global
(interchange.cfg) configuration file,
and will affect all websites running under the Interchange installation.
It will not work in a website's local (catalog.cfg)
The directive can be used to specify the number of Interchange servers that
should be started when Interchange is run in PreFork mode.
If this directive is not specified,
and Interchange is run in PreFork mode,
then 10 page servers will be started.