Faster stepping amidst breakpoints

[Joel Brobecker]

> Let's throw the switch after the 7.3 release and see if people even
> notice.

Maxim Grigoriev actually noticed a regression, and I also noticed
something on VxWorks.  From what I've seen from Maxim's message,
and the regressions we've seen on VxWorks, they might be the same
bug - but the power supply for the VxWorks board I'm using keeps
dying on me :-(.

-- 
Joel