p5-libwww: update to 6.68.

6.68      2023-02-27 19:18:33Z
    - Remove dynamic dependency on HTTP::Status (GH#419) (Graham Knop)
    - Raise minimum version of HTML::HeadParser to 3.71 (GH#422) (Olaf Alders)
    - Apply perlimports to tests (GH#418) (Olaf Alders)

6.67      2022-06-14 20:20:12Z
    - Remove undocumented LWP::Version sub (GH#416) (James Raspass)

6.66      2022-05-18 16:44:44Z
    - Revert automatic follow of meta refresh tags which was added in 6.63
      (GH#415) (Olaf Alders)

6.65      2022-05-09 18:36:14Z
    - fix NAME in Makefile.PL (GH#413) (Graham Knop)

6.64      2022-04-26 13:16:03Z
    - Remove unused variable introduced in 9d73bc422 (GH#411) (Olaf Alders)

6.63      2022-04-25 15:24:10Z
    - Redirect on meta refresh (GH#409) (grr)

6.62      2022-04-05 01:04:17Z
    - Allow downloading to a filehandle (GH#400) (Andrew Fresh)

(wiz)