* Update description of the --system-site-packages option
* Show --copies option in the usage

Based on patch by Hagen Fürstenau and Daniel Urban.

* Update description of the --system-site-packages option
* Show --copies option in the usage

Testing for a non-existing certificate file is already done in test_errors().
Copy wrongcert.pem from Python 2 and use it to test the behaviour with a
mismatched certificate.

non-atomic attributes.

non-atomic attributes.

of PyArg_Parse*() functions.

of PyArg_Parse*() functions.

* Issue #25234: Skip test_eintr.test_open() under OS X to avoid hanging
* Issue #25868: Try to make test_eintr.test_sigwaitinfo() more reliable
  especially on slow buildbots. Use a pipe to synchronize the parent and the
  child processes.

Issue #26227: On Windows, getnameinfo(), gethostbyaddr() and gethostbyname_ex()
functions of the socket module now decode the hostname from the ANSI code page
rather than UTF-8.

Also add some more tests. Based on patch by Sye van der Veen.

Most of the docs has already been updated in c3c188a0325a.

Most of the docs has already been updated in c3c188a0325a.

Patch by Raphael Das Gupta.

Patch by Raphael Das Gupta.

Augment htest to include all major IOBinding functions.

Issue #26217: resize_compact() must set wstr_length to 0 after freeing the wstr
string. Otherwise, an assertion fails in _PyUnicode_CheckConsistency().