imapd.conf option for setting SASL_PATH ?

[Jeff Blaine]

I need to explicitly override what our Cyrus IMAPd/SASL
build is using for SASL_PATH, as it appears to be
misusing what has already been explicitly configured:

http://asg.andrew.cmu.edu/archive/message.php?mailbox=archive.cyrus-sasl&msg=9025

That is, it would appear that SASL does not take
'--with-plugindir=/wherever' to mean "Find plugins
here and ONLY here."

Instead, it seems to mean, "APPEND (not even PREPEND!)
/wherever to my compile-time generated list of places
to try to find plugins."

Is there a sasl_* option for imapd.conf to specify
where (and ONLY where) to look for SASL plugins?  As you
can see, I've already posted to the cyrus-sasl list.