HANDLING NON-URLENCODED ARGUMENTS

If POSTed data is not of type application/x-www-form-urlencoded or
multipart/form-data, then the POSTed data will not be processed,
but instead be returned as-is in a parameter named POSTDATA.
To retrieve it, use code like this:

   my $data = $query->param('POSTDATA');

(If you don't know what the preceding means, don't worry about it.
It only affects people trying to use CGI for XML processing and
other specialized tasks.)