Replace "running" with "not started" and don't show the pid if the subprocess
didn't start yet.

Also, document SystemExit.code attribute explicitly.

Patch by Martin Panter.

Patch by Sayan Chowdhury.

time.  Patch by Davin Potts.

Issue #23576: Avoid stalling in SSL reads when EOF has been reached in the SSL layer but the underlying connection hasn't been closed.

These functions are not documented but used in third-party code.

Patch by Alex Shkop.

The test checks that the environ argument contains correct headers,
querystring and path information.

Patch by Alex Shkop.

TOS is an abbreviation of top-of-stack.

Patch by Sven Berkvens-Matthijsse.

Also, remove support.run_doctest() since there is no doctests in
test_urllib2 and urllib.request.

 * Eliminated OverflowError from timedelta * float for some floats;
 * Corrected rounding in timedlta true division.