Is there a graceful shutdown of imapd process?

My goal is to be able to reload the imapd.conf file for imap processes without impacting currently connected subscribers. I know that there are some patches available to allow this to be done with a SIGHUP, but until they are widely accepted and one is brought into the code thread, we will probably

move mailboxes and mark email as "read"

Hi I'll move several thousand cyrus mailboxes to a new server. Old Server was running cyrus imapd 2.2, new server runs cyrus imapd 2.3. The task seems pretty trivial. I tar all users starting with A (later b,c,d..), create all mailboxes on the new server with cyradm (script), extract the tar f