mail: add a missing argument to properly override starttls
I didn't look into when this changed, but it was flagged by PyCharm.
--- a/mercurial/mail.py Wed Mar 01 11:53:31 2023 -0500
+++ b/mercurial/mail.py Wed Mar 01 12:37:05 2023 -0500
@@ -54,7 +54,7 @@
self._ui = ui
self._host = host
- def starttls(self, keyfile=None, certfile=None):
+ def starttls(self, keyfile=None, certfile=None, context=None):
if not self.has_extn("starttls"):
msg = b"STARTTLS extension not supported by server"
raise smtplib.SMTPException(msg)