Issue #28666: Now test.support.rmtree is able to remove unwritable or

unreadable directories.

diff --cc Misc/NEWS
index c7504fabb60a4ac2cd0fd4481b8bbdc81705a90d,b91badfcde63415650c728ac615c425c824048b2..25d68ce2d81167e232829891bd734264e4e6e185
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -453,42 -487,21 +453,45 @@@ Buil
  - Issue #15819: Remove redundant include search directory option for building
    outside the source tree.
  
 -Tests
 ------
 +- Issue #28676: Prevent missing 'getentropy' declaration warning on macOS.
 +  Patch by Gareth Rees.
  
 -- Issue #28217: Adds _testconsole module to test console input.
 +Tools/Demos
 +-----------
  
 +- Issue #15369: The pybench and pystone microbenchmark have been removed from
 +  Tools. Please use the new Python benchmark suite
 +  https://github.com/python/performance which is more reliable and includes a
 +  portable version of pybench working on Python 2 and Python 3.
  
 -What's New in Python 3.6.0 beta 1
 -=================================
 +- Issue #28102: The zipfile module CLI now prints usage to stderr.
 +  Patch by Stephen J. Turnbull.
  
 -*Release date: 2016-09-12*
 +Tests
 +-----
  
 -Core and Builtins
 ------------------
++- Issue #28666: Now test.support.rmtree is able to remove unwritable or
++  unreadable directories.
+ 
 -- Issue #23722: The __class__ cell used by zero-argument super() is now
 +- Issue #23839: Various caches now are cleared before running every test file.
 +
 +- Issue #26944: Fix test_posix for Android where 'id -G' is entirely wrong or
 +  missing the effective gid.
 +
 +- Issue #28409: regrtest: fix the parser of command line arguments.
 +
 +- Issue #28217: Adds _testconsole module to test console input.
 +
 +
 +What's New in Python 3.6.0 beta 1
 +=================================
 +
 +*Release date: 2016-09-12*
 +
 +Core and Builtins
 +-----------------
 +
 +- Issue #23722: The __class__ cell used by zero-argument super() is now
    initialized from type.__new__ rather than __build_class__, so class methods
    relying on that will now work correctly when called from metaclass methods
    during class creation. Patch by Martin Teichmann.