authmeth: removal of DIGEST-MD5

Based on the comments to the WG over the past several days, I believe
that authmeth should only reference DIGEST-MD5 in historical terms.  The
Simple Mechanism Security Considerations currently state: 

The name/password authentication mechanism of the simple Bind method
discloses the password to the server, which is an inherent security
risk. There are other mechanisms such as DIGEST-MD5 that do not disclose
the password to the server. 

I would like to replace this reference with DIGEST-MD5 with another
mechanism (it does not need to be normative) that would not disclose the
password to the server. Suggestions? 

Thanks, 

Roger