This backports the fix from #16611, per discussion with the release
manager.

This is instead of svn.python.org, whose certificate recently expired, and
whose new certificate uses a different root certificate.

The certificate used at the pythontest server was modifed to set the "basic
constraints" CA flag. This flag seems to be required for test_get_ca_certs_
capath() to work (in Python 3.4+).

Added the new self-signed certificate to capath with the following commands:

cp Lib/test/{selfsigned_pythontestdotnet.pem,capath/}
c_rehash -v Lib/test/capath/
c_rehash -v -old Lib/test/capath/
# Note the generated file names
cp Lib/test/capath/{selfsigned_pythontestdotnet.pem,0e4015b9.0}
mv Lib/test/capath/{selfsigned_pythontestdotnet.pem,ce7b8643.0}

The new server responds with "No route to host" when connecting to port 444.

The svn.python.org server recently changed root certificate, causing the test
to fail. This backports revision 4985375db40f.

Patch by Christian Heimes.

and fix by Guido Vranken.

executables used to find the mac address, with /sbin and /usr/sbin as
fallbacks.

Issue #11508: Fixed uuid.getnode() and uuid.uuid1() on environment with
virtual interface.  Original patch by Kent Frazier.

Issue #18784: The uuid module no more attempts to load libc via ctypes.CDLL,
if all necessary functions are already found in libuuid.
Patch by Evgeny Sologubov.

Issue #16102: Make uuid._netbios_getnode() work again on Python 3.

Fix-up for 0f362676460d: add missing size argument to SSLFakeFile.readline(), as in 2.6 backport 8a6def3add5b

failures when ssl is not present.

line length.  Patch by Emil Lind.

with non-standard cookie handling in some Web browsers.

Reported by Sergey Bobrov.

65536 bytes and send a 414 error code for higher lengths. Patch contributed
by Devin Cook.

weakrefs.

prevent readline() calls from consuming too much memory.  Patch by Jyrki
Pulliainen.

limiting the call to readline().  Original patch by Christian Heimes.

limiting the call to readline().  Original patch by Michał
Jastrzębski and Giampaolo Rodola.

100 headers are read.  Adapted from patch by Jyrki Pulliainen.