add three standard prerequisites, too

kwiki/kwiki-apache.conf

@@ -30,6 +30,9 @@ Alias /kwiki/ @l_prefix@/var/kwiki/
             #   support optional lib/ subdir similar to index.cgi 
             use lib "@l_prefix@/var/kwiki/lib";
             #   pre-load all Kiwki plugins
+            use CGI;
+            use Spoon;
+            use Spiffy;
             use Kwiki;
             use IO::File;
             my $io = new IO::File "<@l_prefix@/var/kwiki/plugins" or die;