[Mimedefang] SA 3.2.0 Rule Shortcircuiting Info

[Kevin A. McGrail]

The release candidates for SA 3.2.0 are not final but I thought the reply 
from Justin Mason concerning the new short-circuiting plug-in would be of 
interest.  This was in response to my forwarding of David's ordering 
thoughts to the SA Development list for consideration.

Regards,
KAM

> I think the algorithm we now have in 3.2.0 works pretty well -- it imposes
> a minimal slowdown, which is the big problem with shortcircuiting. (With
> hundreds of rules, the naive shortcircuiting algorithm -- check after
> every rule fires -- turns out to be too slow.)
>
> Also, we now expose a plugin API for shortcircuiting, so it's easy to
> implement new algorithms ;)
>
> --j.