[Dovecot] "Multiple Commands in Progress" support

Section 5.5 of RFC3501 discusses the ability of IMAP servers to receive and execute multiple commands asynchronously on a single IMAP connection, not necessarily responding in the same order the commands were received:

http://tools.ietf.org/html/rfc3501#section-5.5

Does Dovecot take advantage of this ability, or does it simply queue up the commands and execute them synchronously in order?

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