Patch #1504073: Fix tarfile.open() for mode "r" with a fileobj argument.

Backport from rev. 53161.
diff --git a/Misc/NEWS b/Misc/NEWS
index 205ea40..9acc771 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -122,6 +122,8 @@
 Library
 -------
 
+- Patch #1504073: Fix tarfile.open() for mode "r" with a fileobj argument.
+
 - Patch #1262036: Prevent TarFiles from being added to themselves under
   certain conditions.