I have wandered through several Swish-e documents, trying to
figure out how to spider PDF files.  AFAICT, the current plan
involves adding a line to spider.config:

   filter_content  => \&filter_content,

but I suspect that more than this is required.  Help?

-r

P.S.  I already have spider.pl working, using a moderately
       customized spider.config file; I just want to get it
       to filter and index PDF files.