Using regex with bayes_ignore_header

[Jeremy Fairbrass <jf...@hotmail.com>]

Hi, can anyone tell me if it's allowed to use regex with bayes_ignore_header 
in local.cf? I've seen this done here and there by others but don't know if 
it's actually allowed or will cause things not to function properly. For 
example:

bayes_ignore_header X-Spam-\S+

If this *is* allowed, are there any pros or cons to it, eg. in terms of 
performance or anything? I guess the main advantage to it is making local.cf 
a little tidier and smaller if you have lots of similar headers you want to 
use with bayes_ignore_header.

Cheers,
Jeremy