Message 72206 - Python tracker

Docs updated for 3.0 in r66084 (and I was right in thinking the
automatic merge didn't have a hope of getting this right - there were
conflicts all the way through the file).

Closing this issue after a mere 5 years and 9 months - any requests for
better proxying/special method delegation support in the standard
library should be raised in a new tracker issue as a feature request for
2.7/3.1.