imap: implement cancellation of opening dir and listing contents

Check for a cancelled context when opening a directory, and before+after
fetching directory contents/threads. Clean up the nesting of
fetchDirectoryContents by using what we already know about server
capabilities and using a switch statement.

Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
Tested-by: Bence Ferdinandy <bence@ferdinandy.com>
Acked-by: Robin Jarry <robin@jarry.cc>

0 files changed, 0 insertions, 0 deletions