plugin hooks

[Rafael Espindola]

> We should add hooks as we find plugins that need them.  Simply adding
> a laundry list of hooks that we think might be needed will most likely
> cause us to overdesign.  We know that we can write interesting plugins
> today, so we're not missing anything critical.
>
> I agree that it should be OK to add hooks in stage 3, if they are
> clearly safe and clearly needed.

Sorry for being late in joining the thread. I fully agree with this.
We should add hooks as someone finds a need for it.

Changes like this are likely to be safe, but I am not sure if they are
stage3 OK. We should probably look at it in a case by case basis.

> Ian
>

Cheers,
-- 
Rafael Ávila de Espíndola