PATCH: Display IMAP Mailbox counts on startup

["M . Thielker" <balsa t-data com>]

Hi,

 here's another one...

Fixes:
- Despite the fact that IMAP servers can provide summaries of the messages
  in mailboxes, libmutt did not use this information. This patch adds
  the functionality to libmutt.
- On startup, all folder totals are read through a single IMAP connection.
  No mailboxes are opened and no delays opeing incurred
- The designated inbox is now opened automatically. This is really part
  of balsa-imapflags.patch, because when the inbox is not opened, new
  mail notification will not work. Through this change, the inbox will
  always be opened when Balsa is launched, therefore avoiding this problem
- New mail check will update the folder totals for unopened folders and
  will alert when new mail arrives in a closed IMAP folder.

Requires:
- Balsa source tree from CVS
- balsa-imapflags.patch

Notes:
- When balsa-alltoolbars3.patch is applied after these two, minor fuzz will
  result.

Cheers,

Melanie

balsa-imapcounts.patch