Update to 0.9.5.4. Relevant changes:

Update to 0.9.5.4. Relevant changes:

0. Misc bug fixes, including:
    * slrn now honors port information encoded in hostname when
      refreshing newsgroups.
1. Tweak to generation of NEWGROUPS server command to make it y2k
   compliant.  (In my opinion, the protocol is weak in this area)
3. New configuration variable: set simulate_graphic_chars 0
4. Patch from Hubert Figuiere <Hubert.Figuiere@solsoft.fr> to handle
   (broken?) knews iso-latin1 mime encoding.
5. New configuration variable: set auto_mark_article_as_read 1
   If zero, reading an article will not cause it to be marked as read.
6. It is now possible to specify what headers to show via the .slrnrc
   line:
       visible_headers "From:,Subject:,Newsgroups:,Followup-To:,Reply-To:"
7. Tweak to group.c:group_sync_group_with_server courtesy of
   stesch@parsec.rhein-neckar.de (Stefan Scholl).