Name of the newsgroup to add.
Hash with one entry, indicating where to put the newsgroup. Key
where, and possible values are:
Put immediately after newsgroup
group, or last if
group is not there.
Put in alphabetical order.
Put immediately before newsgroup
Put as first newsgroup.
Put as last newsgroup.
Put at position
n, where the first position is 0. If position is
negative, count from the end of the list backwards