[InterNetNews/inn] 765df9: Reject articles arriving in a full newsgroup

[Julien ÉLIE]

  Branch: refs/heads/2.7
  Home:   https://github.com/InterNetNews/inn
  Commit: 765df988fa3c4187b2e27283202d7225c6ccb255
      https://github.com/InterNetNews/inn/commit/765df988fa3c4187b2e27283202d7225c6ccb255
  Author: Julien ÉLIE <Julien-Elie at users.noreply.github.com>
  Date:   2023-01-21 (Sat, 21 Jan 2023)

  Changed paths:
    M doc/pod/news.pod
    M include/inn/nntp.h
    M innd/art.c

  Log Message:
  -----------
  Reject articles arriving in a full newsgroup

Check that article numbers correctly lie between 1 and 2147483647 (2^31-1).
Otherwise, bad things happen...

close #251