Patch by Milan Oberkirch, with a few updates.  This changeset also
tweaks the smtpd and whatsnew docs for smtpd into what should be
the final form for the 3.5 release.

Original patch by Milan Oberkirch, updated by myself and
Maciej Szulik.

Closes issue #22906.

Patch from Marc-Andre Lemburg.

any keyword arguments.  Previously it silently ignored them.

Also: merge related change from 3.4, also reported on Issue #20274.

METH_VARARGS methods on _sqlite.Connection.

anywhere in the name of the current directory.

"format units".  Updated the documentation to match.

Basically, s/thread/coroutine/.

assertWarnsRegex() checks are not longer successful if the callable is None.

Added tests for assertRaises().

assertWarnsRegex() checks are not longer successful if the callable is None.

Added tests for assertRaises().