[InterNetNews/inn] 3dd0df: Update links to ftp.gnu.org and ftp.perl.org

[Julien ÉLIE]

  Branch: refs/heads/main
  Home:   https://github.com/InterNetNews/inn
  Commit: 3dd0dfd76b9fa681533941378b4151b832b68e80
      https://github.com/InterNetNews/inn/commit/3dd0dfd76b9fa681533941378b4151b832b68e80
  Author: Julien ÉLIE <Julien-Elie at users.noreply.github.com>
  Date:   2023-03-05 (Sun, 05 Mar 2023)

  Changed paths:
    M doc/pod/hacking.pod
    M doc/pod/install.pod

  Log Message:
  -----------
  Update links to ftp.gnu.org and ftp.perl.org

Homogenize at the same time the wording about CPAN and Libtool.

No longer mention old Perl 5.005 which is 25 years old now!