In some cases we had offlineimap trying to delete emails that shouldn't
be deleted. E.g. https://bugzilla.redhat.com/show_bug.cgi?id=708898.
It turns out that imaplib2 does not like FETCH responses that are
interrupted by other unsolicited server responses, e.g.
* OK Searched 43% of the mailbox, ETA 0:12\r\n
Bump imaplib2 to a version that can cope with these (legal) responses by
the IMAP server.
Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>
Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>