Patch by Vajrasky Kok.

Patch by Martin Panter.

and email.test.

Patch by David Edelsohn.

Patch by Martin Panter.

Issue #23445: pydebug builds now use "gcc -Og" where possible, to make the resulting executable faster.

Fix undefined behaviour: don't compare pointers. Use Py_uintptr_t type instead
of void*. It fixes test_faulthandler on Fedora 22 which now uses GCC 5.

already finished

Fixes a regression in issue #22765.  Patch by Vinson Lee.

Patch by Eldar Abusalimov.

(currently only used for builds with <= 10.5 deployment targets)

on Windows

values (like 0.9.8zc).

pass -I or -E to the child process by default when the environment is required
for the child process interpreter to function properly.

* _check_resolved_address() is implemented with getaddrinfo() which is slow
* If available, use socket.inet_pton() instead of socket.getaddrinfo(), because
  it is much faster

Microbenchmark (timeit) on Fedora 21 (Python 3.4, Linux 3.17, glibc 2.20) to
validate the IPV4 address "127.0.0.1" or the IPv6 address "::1":

* getaddrinfo() 10.4 usec per loop
* inet_pton(): 0.285 usec per loop

On glibc older than 2.14, getaddrinfo() always requests the list of all local
IP addresses to the kernel (using a NETLINK socket). getaddrinfo() has other
known issues, it's better to avoid it when it is possible.