$newsrc->add_group(groupname[,options])
Adds newsgroup to .newsrc, as a subscribed group. Defaults to adding at the end. The arguments are:
Name of the newsgroup to add.
Hash with one entry, indicating where to put the newsgroup. Key
is where, and possible values are:
after => groupPut immediately after newsgroup group, or last if
group is not there.
alphaPut in alphabetical order.
before => groupPut immediately before newsgroup group.
firstPut as first newsgroup.
lastPut as last newsgroup.
number => nPut at position n, where the first position is 0. If position is
negative, count from the end of the list backwards n positions.