Actually, you mean the IBL (Internal Banlists). There isn't a built-in feature to auto fill them, but I've written a script to do as much. I'll link to it.

It has a bug with Unreal IRCd in that Unreal can only do one /mode flag at a time, and it uses +q for owner status instead of quiet list.

Sorry about the size, it's mostly the comments that make it long, but readable.

Well. At least I won lunch.
Good philosophy, see good in bad, I like!