[Pan-devel] Another big Pan code commit

[Charles Kerr]

I've committed a big set of changes to attack bug #132477, excessive 
memory usage in large newgroups.

The main change is that each multipart header from XOVER is now stored 
in an AttachmentPart struct, which holds the minimal unique info we need 
for each post (size, date, xref, message-id).  The Article struct's 
"threads" field has been split into two: "followups" and "attachments", 
where "attachments" is a list of AttachmentParts.  So no matter how many 
parts a multipart has, it's still just one Article.

As a side-effect the ~/.pan/servername/groupname datafiles are about 50% 
smaller, and threading and header pane updates in large groups are 
absurdly fast.  *big grin*

K. Haley: how big of a monkey wrench does this throw into your database 
schema?

As an aside, our ANNOUNCE file is getting long: dropping the memory 
footprint, dropping pthreads, dropping GNet, and adding X-Face are all 
pretty nice.  After the dust settles from today's commit, it's time for 
a new release -- assuming I can remember how... ;)

cheers,
Charles