* fixes and additions to the configparser stub
This broke pytype because of the type ignore. I think it's OK to blacklist
because another instance of this same error (stdlib/3/email/policy.pyi line 95)
is already blacklisted. We can remove it when the pytype parser is fixed to
allow type ignores in this context.
* add SectionProxy.__getattr__
* the __getattr__ returns Any
* don't need type ignore for pytype if we put it all on one line
