Questions about filters

[Emmanuel <e allaud wanadoo fr>]

	Hi all,
I'm trying to implement basic filter support in Balsa. The patches still 
need lot of testing so I didn't attach them but I have several questions 
to make progress further : I'd need to know how to integrate the filters 
in balsa, ie where they are actually called on mailbox or incoming 
messages (I have found nothing like that in sources). What are the other 
possible invocations of filters : eg I saw the filter_run_dialog 
function, so I guess the user could launch this dialog and run any 
filter by hand ?
Other question : there are 3 flags I don't understand 
FILTER_PLACE,FILTER_NOPLACE,FILTER_STOP (in libbalsa/private.h). What do 
they mean?
Another question is about reg. exp : I saw something about using PCRE 
for URL parsing, I guess I'll have to use that lib too (when I have time 
to code reg exp matches :).
Thanks for any help
Bye
Manu