reset_transaction between AUTH and MAIL_FROM

[Jared Johnson]

I've begun working on a custom auth plugin and tried setting some 
transaction notes after successful authentication based on the 
credentials that were used.  Of course this didn't work, as the 
transaction is reset as soon as MAIL FROM is issued.  I can probably get 
around this with connection notes, of course, but I was just wondering 
whether it was intentional for transactions to be reset between MAIL 
FROM and AUTH, rather than at the first issue of *either* MAIL FROM *or* 
AUTH?

-Jared