Changes: 1.2 -> 1.4

* gronknntp config files have moved into $SNARFCONF/sites

* gronknntp extra tabbing to make "bad group" messages stand out more.

* filterart now has size checking

* filterart/filterbatch can have config files specified on cmdline, to
be found in $SNARFCONF/filter/<filename>; default rules are used from
$SNARFCONF/filter/default if no name is specified.

* new commands: gronkmsgids & nntpmsgids; the former acts like
"gronknntp" and produces a list of new message-ids to stdout.  the
latter reads messages from stdin and fetches them from the server
specified on the cmdline.
