Issue #5835, deprecate PyOS_ascii_formatd.

If anyone wants to clean up the documentation, feel free. It's my first documentation foray, and it's not that great.

Will port to py3k with a different strategy.
diff --git a/Misc/NEWS b/Misc/NEWS
index 7c36bda..b211512 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,9 @@
 Core and Builtins
 -----------------
 
+- Issue #5835: Deprecate PyOS_ascii_formatd and replace it with
+  _PyOS_double_to_string or PyOS_double_to_string.
+
 - Issue #5283: Setting __class__ in __del__ caused a segfault.
 
 - Issue #5816: complex(repr(z)) now recovers z exactly, even when