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Netscape cookies or with hidden fields in forms and value-attribute pairs
in the URLs. State preserving URLs are more desirable, because they are
independent of the client configuration, but tend to get unwieldy with
increase in space complexity of the application.

CGI::Persistent solves this problem by introducing persistent CGI sessions
that store their state data on the server side. When a new session starts,
CGI::Persistent automatically generates a unique state identification string
and associates it with a persistent object on the server. The identification
string is used in URLs or forms to refer to the particular session. Request
attributes are transparently committed to the associated object and the
object data is bound to the query.

CGI::Persistent is derived from CGI.pm. CGI.pm methods have been overridden
as appropriate. Very few new methods have been added.  

=head1 METHODS 

=over 4

=item B<new()>