[InterNetNews/inn] 51a3c8: scanspool: Correctly parse folded header fields

[Julien ÉLIE]

  Branch: refs/heads/main
  Home:   https://github.com/InterNetNews/inn
  Commit: 51a3c89ed3775a78a61a0ab5b24c3a9b1baaf095
      https://github.com/InterNetNews/inn/commit/51a3c89ed3775a78a61a0ab5b24c3a9b1baaf095
  Author: Julien ÉLIE <Julien-Elie at users.noreply.github.com>
  Date:   2023-12-27 (Wed, 27 Dec 2023)

  Changed paths:
    M doc/pod/news.pod
    M doc/pod/scanspool.pod
    M frontends/scanspool.in

  Log Message:
  -----------
  scanspool: Correctly parse folded header fields

Only the first line of a Newsgroups header field was previously parsed.

see #289 and #193