ITS#5555 - Correct documentation for SASL AuthzTo Check

This patch file is derived from OpenLDAP Software. All of the
modifications to OpenLDAP Software represented in the following patch(es)
were developed by Andrew Findlay <andrew.findlay@skills-1st.co.uk>.
I have not assigned rights and/or interest in this work to any party.

I, Andrew Findlay, hereby place the following modifications to OpenLDAP
Software (and only these modifications) into the public domain. Hence,
these modifications may be freely used and/or redistributed for any
purpose with or without attribution and/or other notice.