API Changes

Functions Removed

SASL

Functions Added

SASL

Transport

Authentication and Encryption Combinations

↓Auth\Encryp→	None	SSL	SASL
None	1.	Privacy only
SSL		2.
SASL	Auth only	4.	3.

In this table "auth" means client authentication.

Entries in pink aren't allowed/don't make any sense
All other entries have some use

The numbered boxes are the combinations that are reasonably important:

Anonymous, "public" connection
Encrypted connection with client certificate
Kerberos or DIGEST-MD5
Usually SSL encryption with PLAIN authentication.

Note that all of the SSL encryption possibilities have some use and all could be used to authenticate the server for the client to avoid "man-in-the-middle" attacks.