Adding additional protocols via IRC

This is an idea we discussed on blitzed a few days ago, I think it's
quite a good idea. Basically you put additional ports/protocols to scan
in the channel topic (the idea being, you have a central channel, this
then lets you keep all the BOPMs scanning the same ports).

Obviously one concern is security, but being able to add ports isn't
that serious and you're limited by the topic limit how many you can
add anyway..

There are patches at http://o.dgl.cx/bopm-topic-check.diff and
http://o.dgl.cx/libopm-check.diff (for libopm).

You need to put something a bit like this in the topic:
addproto:SCANNER:PROTO:PORT,PROTO:PORT

So for example
addproto:default:hc:65506,3802,hp:808

(Notice you can omit protocols (and ports) that are the same, so the
string should be pretty compact).

I'd be interested to hear comments..