dummysmtpd: accept additional kwargs from stdlib smtpd This was causing extremely mysterious failures because smtpd is implemented using asynchat, which in turn doesn't appear to do anything *remotely* helpful if an exception occurs. # no-check-commit because I'm editing a foo_bar function signature test-patchbomb-tls.t now passes in Python 3, but only because it doesn't check message bodies like test-patchbomb.t. test-patchbomb.t is *full* of doubled headers in the output (eg [0]) which seems like an odd failure mode. 0: @@ -141,12 +154,17 @@ MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit + MIME-Version: 1.0 + Content-Type: text/plain; charset="us-ascii" + Content-Transfer-Encoding: 7bit Subject: [PATCH] bookmark X-Mercurial-Node: 8dab2639fd35f1e337ad866c372a5c44f1064e3c X-Mercurial-Series-Index: 1 X-Mercurial-Series-Total: 1 Differential Revision: https://phab.mercurial-scm.org/D4219