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use CGI::Fast qw(:standard);
    $COUNTER = 0;
...
            hr;
        print end_html;
    }

LoadModule fcgid_module /usr/lib/apache2/modules/mod_fcgid.so
ScriptAlias /cgi-bin/ "/srv/perl/cgi-bin/"
...
  </Directory>
  ...
</VirtaulHost>

SetHandler fcgid-script