Guard shutil._make_archive against a logger=None argument.
Backporting two lines from the 3.x tests was enough to trigger the bug.
I also took the opportunity of making the logging call lazy.
diff --git a/Misc/NEWS b/Misc/NEWS
index 679b4b0..78f4fa6 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -40,6 +40,8 @@
Library
-------
+- Issue #9173: Let shutil._make_archive work if the logger argument is None.
+
- Issue #12650: Fix a race condition where a subprocess.Popen could leak
resources (FD/zombie) when killed at the wrong time.