Previous approach of installing coroutine wrapper in loop.set_debug() and
uninstalling it in loop.close() was very fragile.  Most of asyncio tests
do not call loop.close() at all.  Since coroutine wrapper is a global
setting, we have to make sure that it's only set when the loop is
running, and is automatically unset when it stops running.

Issue #24017.

Previous approach of installing coroutine wrapper in loop.set_debug() and
uninstalling it in loop.close() was very fragile.  Most of asyncio tests
do not call loop.close() at all.  Since coroutine wrapper is a global
setting, we have to make sure that it's only set when the loop is
running, and is automatically unset when it stops running.

Issue #24017.

Changes:

* Fixed a ResourceWarning warning
* Used argparse instead of getopt

Changes:

* Fixed a ResourceWarning warning
* Used argparse instead of getopt

if they called on a closed object.

Patch by John Hergenroeder.

if they called on a closed object.

Patch by John Hergenroeder.

except named tuples.

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.