Item14033: skip POSTDATA when iterating ...

... over all url params in existance. This is a flaw in CGI.pm that
makes it thru Foswiki: POSTDATA isn't an url param actually, it is posted data.
However CGI::param() doesn't distinguish these clearly. So we have to in
weird places like TOC and the PageCache.

core/lib/Foswiki/Macros/TOC.pm

@@ -122,6 +122,7 @@ sub TOC {
         next if ( $name eq 'topic' );
         next if ( $name eq 'text' );
         next if ( $name eq 'refresh' );
+        next if ( $name eq 'POSTDATA' );
         push( @qparams, $name => scalar( $query->param($name) ) );
     }