Comment 5 for bug 551073

> "-b" completion is not enough.

I thought bloadcast adress is input by hand, so I left it as blank.
Your idea is great.

Besides you made changes more.
I guess you intend to complete TARGET and OPTIONS at the same time.
But it's not my intended behavior.

For example, could you try the below lines in terminal
$ apt-cache [TAB]
$ apt-cache -[TAB]

That's my intended behavior.
So I didn't merge your branch to mine, but I picked up --broadcast option completion as rev.147.