[Dovecot] v2.0.20 released

http://dovecot.org/releases/2.0/dovecot-2.0.20.tar.gz http://dovecot.org/releases/2.0/dovecot-2.0.20.tar.gz.sig

    + doveadm user: Added -m parameter to show some of the mail settings.
    - doveadm import didn't import messages' flags
    - Make sure IMAP clients can't create directories when accessing
      nonexistent users' mailboxes via shared namespace.
    - Dovecot auth clients authenticating via TCP socket could have failed
      with bogus "PID already in use" errors.