[Python-porting] Pickling unbound methods on Python 3

["Martin v. Löwis"]

> Great! I prefer adding an attribute to the unbound methods as well.
> Would you like to raise this on python-dev or would you like me to?

I'm very skeptical that "raising" it will have any effect. Submit a 
patch instead.

> (I haven't been active there and I don't know which issues are
> in consensus and which aren't.)

Consensus is irrelevant in absence of a patch.

Regards,
Martin