remove CGI where possible

use mod_perl request with fallback to CGI::Simple where possible.

website/agenda/upload_playout.cgi

@@ -3,10 +3,6 @@
 use warnings "all";
 use strict;
 
-use CGI qw(header param Vars);
-$CGI::POST_MAX        = 1000;
-$CGI::DISABLE_UPLOADS = 1;
-
 use Data::Dumper;
 
 use JSON();