ISsue #14988: restore Python 2's behavior of raising ImportError when unable to load pyexpat, instead of a SystemError/RuntimeError

Based on a patch by Nick Coghlan.

Based on a patch by Nick Coghlan.

Issue #15230: Attempt to make the OS X buildbots happy by resolving the tmp dir symlink in the test suite

The asserts were useless (and buggy).

The asserts were useless (and buggy).

Preserve the invariant tostring(elem) == b''.join(tostringlist(elem)) and add a test to make sure it keeps working

select.poll before running.  works both ways (finally).  this should
fix the windows build.

select.poll before running.  works both ways (finally).  this should fix
the windows build.

platforms that don't have it.

platforms that don't have it.

Closes #15367: Corrected computation of include locations for source builds on Windows. Thanks to Richard Oudkerk for the bug report and patch.

Closes #15366: Corrected computation of include location for source builds. Thanks to Richard Oudkerk for the bug report and patch.

- Loosen up test as Fedora has implicit xattrs
- Actually test the destination for xattrs

Should make Fedora buildbot green again.

to avoid failing due to the select() file descriptor limit.

to avoid failing due to the select() file descriptor limit.

- fix test_distutils and test_sysconfig test failures by
  aligning sysconfig and distutils.sysconfig tailoring of
  configure variables (as in 2.7)

Patch by Aaron (hac.man).

from previous checkin.

new parameters in os and shutil functions.  Patch by Serhiy Storchaka.

Update the pkgutil porting section in What's New. This should cause significantly fewer problems after today's updates