Update to 1.9.42. Bugfixes:
- Check lastreply() against NULL, in an effort to fix obscure sporadic and
non-reproducable crashes on OpenBSD sparc64.
- Fix bogus "Cannot open .../interesting.group/group.name for reading" when a
group subscription has expired.
- Fix hang when trying to download an article that lacked mandatory headers.
Submitted by: Matthias Andree <email@example.com>