creating a message index

[Cor B. <co...@xs...>]

I noticed that in mailbox_display.php a message index is created by
looping over the number of messages, and doing a "FETCH xx" for each message.

Would there be any use for me to rewrite that into a "FETCH 1:max" where
max is the total number of messages. Or does SM2 already do something a bit
smarter like that? 

Im unfortunately stuck with UW imap (we have a mix of mailbox and maildir
mailboxes) and the dozens of seperate fetches for header info is just a bit
slowish.

Cor