Implement #1578269. Patch by Jason R. Coombs.

Added Windows support for os.symlink when run on Windows 6.0 or greater,
aka Vista. Previous Windows versions will raise NotImplementedError
when trying to symlink.

Includes numerous test updates and additions to test_os, including
a symlink_support module because of the fact that privilege escalation
is required in order to run the tests to ensure that the user is able
to create symlinks. By default, accounts do not have the required
privilege, so the escalation code will have to be exposed later (or
documented on how to do so). I'll be following up with that work next.

Note that the tests use ctypes, which was agreed on during the PyCon
language summit.

2 files changed, 4 insertions, 0 deletions

diff --git a/Misc/ACKS b/Misc/ACKS
index 4608843..ec42bf9 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -154,6 +154,7 @@ Benjamin Collar
 Jeffery Collins
 Robert Collins
 Paul Colomiets
+Jason R. Coombs
 Geremy Condra
 Juan José Conti
 Matt Conway
diff --git a/Misc/NEWS b/Misc/NEWS
index d1edda2..729c010 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -1406,6 +1406,9 @@ Library
 Extension Modules
 -----------------
 
+- Issue #1578269: Implement os.symlink for Windows 6.0+. Patch by
+  Jason R. Coombs
+
 - In struct.pack, correctly propogate exceptions from computing the truth of an
   object in the '?' format.