The newsetup program creates a new .newsrc file containing all of the currently active newsgroups. It tries
to put them in a reasonable order, i.e. local newsgroups earlier, but you'll probably want to change the
ordering anyway (if you use rn) in order to put interesting newsgroups first. If you already have a .newsrc,
it will be backed up with the name ".oldnewsrc".
DOTDIR Where to put your .newsrc, if not in your home directory.
HOME Your home directory.
LOGDIR Your home directory if HOME is undefined.
/usr/lib/news/active or a reasonable facsimile