all the upper level libraries that use it, including urllib2.
Added and fixed some tests, and changed docs correspondingly.
Thanks to John J Lee for the patch and the pusing, :)
- Factor out the duplication of EHLO/HELO in login() and sendmail() to
a new function, ehlo_or_helo_if_needed().
- Use ehlo_or_helo_if_needed() in starttls()
- Check for the starttls exception in starttls() in the same way as
login() checks for the auth extension.
Contributed by Bill Fenner.
Georg Brandl
Andrew M. Kuchling
Facundo Batista
Gregory P. Smith