* providers/imap/camel-imap-command.c (camel_imap_command_start):
Send an IMAP command, but don't wait for responses.
(camel_imap_command_response): Read a single line of response from
the server.
(camel_imap_command, etc): Reimplement in terms of the new code.
* providers/imap/camel-imap-folder.c (imap_rescan): Use
camel_imap_command_start and camel_imap_command_response, and
call camel_operation_progress after each line read from the
server.
(imap_update_summary): Likewise, although with more fudging on the
precentages... Also, fix this so that if none of the new messages
are cached, it only does a single FETCH, and if some of them are
cached, it does two FETCHes (one to get the UIDs, FLAGS, and
SIZEs, and another to get the bodies of all of the messages that
aren't cached now that it knows the relevant UIDs). This should
speed up startup a bunch (especially if you have high bandwidth
but also high latency to the IMAP server).
svn path=/trunk/; revision=11430
8e10bc6959