--query should allow granularity to even just one group

[In gmane.discuss:]
>> # noffle -s gmane.network.wwwoffle.announce
>> gmane.network.wwwoffle.announce is not available at remote servers.

Adam>  $ telnet news.gmane.org nntp
Adam>  mode reader
Adam>  group gmane.network.wwwoffle.announce
Adam>  211 0 0 0 gmane.network.wwwoffle.announce

Odd, noffle usually keeps up with new group additions...
I guess I'll just do a
       -q, --query groups|desc [server pattern]
             ... It can take some time on slow connections.

No kidding, therefore I propose extra parameters should be allowed:
just those groups one wants queried. No need for all 34000 groups for
that server when I only want to update one.  That also lessens the fear of:

              resets all local article counters


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