Ooops, my previous patch was wrong (startswith => not startswith).
I tested python trunk test for poplib: with minor changes, all tests
are ok except tests using SSL. I get a "select.error: (9, 'Bad file
descriptor')" from asyncore. So I tried to synchronize python3 ssl
with python2 trunk, but it depends on python2 trunk version of the
socket module and this module is very complex and hard to port to
python3.
About EBADF error from select(), it may comes from missing makefile()
method of the ssl socket wrapper.