Add support imap and maildir recent, fix maildir for dovecot server#188

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tm28300 wants to merge 1 commit intokisli:masterfrom

Commits on Jan 13, 2018

In imap add support RECENT message, in maildir don't move from new to cur directory before fetch a message (same as imap) and for dovecot serveur the root maildir directory can contain messages
Thierry MARTIN
committed