py3: use socket.makefile() instead of dropped smtplib.SSLFakeFile
The latter (undocumented internal) class got removed in Python 3.3. Use
socket.makefile() as suggested:
https://docs.python.org/3/whatsnew/3.3.html#porting-python-code
--- a/mercurial/mail.py Thu Oct 10 21:05:34 2019 +0200
+++ b/mercurial/mail.py Thu Oct 10 21:30:44 2019 +0200
@@ -61,7 +61,7 @@
ui=self._ui,
serverhostname=self._host,
)
- self.file = smtplib.SSLFakeFile(self.sock)
+ self.file = self.sock.makefile("rb")
self.helo_resp = None
self.ehlo_resp = None
self.esmtp_features = {}