REM3-169 Don't ignore client CAPABILITIES that are resent on a auth failure
Prep 3.2.15.GA
Next is 3.2.16.GA
Add version string to initial negotation, for potential later compatibility fixes and information
Add an interoperability mode to emulate buggy window-sizing behavior of older versions
Prep 3.2.16.GA
Next is 3.2.17.GA
[REM3-156] Ensure dispose() is called on SaslClient and SaslServer when they are being abandoned to give them an opportunity to clean up any resources in use.