[Twisted-Python] Deprecated function removal policy

[James Y Knight]

So, I recently stumbled across t.i.base.ReactorBase.clientTCP/SSL/UNIX. 
They have been deprecated since Aug 2002. (version 0.99.0rc5 or so)

Is there some policy for when deprecated functionality can be removed, 
or is it just going to stay forever?

In addition, it would be really nice if every time something got 
deprecated, it got marked with the last version in which it was the 
recommended interface, and the date too, so less investigation needs to 
be done.

James