increased configuration availability, updated default and a warning fix.

Added a bunch of configuration options. 

Worth noting is that SMTPS will no longer default to rejecting all unauthenticated mail. The defaults were the same as submission but should allow unauthenticated delivery to local/relay destinations - at least in my view. It turns out SMTPS/465 is non-standard anyway. 

Also, because of the above change I've added the content filter to SMTPS as well - so spam should be filtered however its delivered - though not from the submission port. 

Other than those things, no change of behaviour without explicit configuration. 

Cheers. 
Tim