* Mark SMTP attibutes with class defaults with "= ..."
* Add SMTP.command_encoding
* Annotate SMTP.__exit__()
* Add SMTP.auth() et al.
* Add LMTP_PORT constant
This fixes all current partial signatures, as well as adding anything
that I happened to have to work out whilst fixing those partial
signatures.
The stubs remain incomplete.
- Updates documentation related to previously required comment headers.
- Removes all comment headers from stubs
- Occasionally included a header for stubs that were noted to be incomplete or contained todo's.