rel2abs takes a html document, either specified as a file on the command
line or streaming in via STDIN, and transforms all relative links in there
to absolute ones, using a specified base URL. It streams its output to STDOUT.
It is currently
looking for <IMG SRC=...> and <A HREF=...> tags only.
Copyright 2002 by Mike Schilli, all rights reserved.
This program is free software, you can redistribute it and/or
modify it under the same terms as Perl itself.