[Dovecot] LDA vs LMTP, Cyrus SASL, verbose_proctitle

[Joseph Tam]

Is there a reason I should prefer LMTP over LDA for local delivery?
Performance?  Security?  The Wiki doesn't differentiates LMTP vs LDA
with respect to sendmail configuration, so am I correct that I just need
to replace mail.local with dovecot-lda, which will choose LDA/LMTP based
on dovecot.conf?

Also, can I consolidate authentication by configuring dovecot to use
what sendmail uses (Cyrus SASL) or vice versa?  The Wiki hints this is
in the works.

Lastly, toggling verbose_proctitle seems to have no effect on the output
of ps.  Is verbose_proctitle broken for Solaris?

Thanks,
Joseph Tam <jtam.home at gmail.com>