PEP 446: add a reference to a previous attempt in 2007

pep-0446.txt

@@ -404,6 +404,19 @@ see `win32.py
 Rejected Alternatives
 =====================
 
+Add a new open_noinherit() function
+-----------------------------------
+
+In June 2007, Henning von Bargen proposed on the python-dev mailing list
+to add a new open_noinherit() function to fix issues of inherited file
+descriptors in child processes. At this time, the default value of the
+*close_fds* parameter of the subprocess module was ``False``.
+
+Read the mail thread: `[Python-Dev] Proposal for a new function
+"open_noinherit" to avoid problems with subprocesses and security risks
+<http://mail.python.org/pipermail/python-dev/2007-June/073688.html>`_.
+
+
 PEP 433
 -------
 
@@ -411,6 +424,7 @@ The PEP 433 entitled "Easier suppression of file descriptor inheritance"
 is a previous attempt proposing various other alternatives, but no
 consensus could be reached.
 
+
 No special case for standard streams
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