[PATCH] Hooks still needed for annotations

[Nick Roberts]

 > Having reread the discussion I would like to ask you what your goal is
 > with this patch.  You don't use this annotation, and you've said that
 > it is very awkward to use because of the amount of output it produces.
 > Why should we fix it (as opposed to garbage collecting it) if no one
 > has missed it?

The original authors must have seen a need when they created these
annotations.  I was just being conservative because there hasn't been a
release of Emacs to test my code fully.

 > The comments in mention() suggest that at one time, GDB was trying to
 > move away from breakpoints_changed to a more specific set of hooks. 
 > But now the hooks are more or less dead, and to get full mileage out of
 > them they're going to need a redesign.  So maybe we should just delete
 > all three hooks, and replace the two that annotations use with
 > calls to breakpoints_changed.

Yes that looks a lot simpler.  If you are agreeable to me fixing it in the
first place, I will do that.

Nick