issue 14826 - Address the buildbot failure quote of url is the required change ( explanation msg164973)

Patch by Brian Brazil.

Patch contributed by Stephen Thorne.

Patch contributed by Stephen Thorne.

Fix 5931 - Python runtime hardcoded in wsgiref.simple_server - Now it specifies an implementation specific term.

earlier without preceding space.

The leak occurred by setting:
echo 1 > /proc/sys/net/ipv6/conf/all/disable_ipv6
before running test_support.

Patch by Brian Brazil.

Issue 14814: Ensure ordering semantics across all 3 entity types in ipaddress are consistent and well-defined

Issue 14814: Explain how to get more error detail in the ipaddress tutorial, and tweak the display for octet errors in IPv4 (noticed the formatting problem when adding to the docs)

Issue 14814: Make the ipaddress code easier to follow by using newer language features (patch by Serhiy Storchaka)

Issue 14814: Provide more informative error messages in ipaddress, and ensure that errors are caught as expected

Issue 14814: %s implies coercion with str() - remove a lot of redundant str() calls from the ipaddress implementation

Issue 14814: Eliminate bytes warnings from ipaddress by correctly throwing an exception early when given bytes data of the wrong length. Also removes 2.x backwards compatibility code from associated tests.

Issue 14814: Better handling of cases where octet/hextet parsing fails, including ensuring that tracebacks are still clean even when calling class constructors directly

Issue #15020: The program name used to search for Python's path is now python3 under Unix, not python.