Create a new parent Perl interpreter for the given <VirtualHost> and give it its own interpreter pool (implies the Clone option).

A common problem with mod_perl 1.0 was that the namespace was shared by all code within the process. Consider two developers using the same server, each of whom wants to run a different version of a module with the same name. This example will create two parent Perl interpreters, one for each <VirtualHost>, each with its own namespace and pointing to a different path in @INC:

<VirtualHost ...>
    ServerName dev1
    PerlOptions +Parent
    PerlSwitches -Mblib=/home/dev1/lib/perl
</VirtualHost>

<VirtualHost ...>
    ServerName dev2
    PerlOptions +Parent
    PerlSwitches -Mblib=/home/dev2/lib/perl
</VirtualHost>