#21167: Fix definition of NAN when ICC used without -fp-model strict.

Patch from Chris Hogan of Intel, reviewed by Mark Dickinson.
diff --git a/Misc/ACKS b/Misc/ACKS
index 93b2a0b..f5868f9 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -583,6 +583,7 @@
 Chris Hoffman
 Stefan Hoffmeister
 Albert Hofkamp
+Chris Hogan
 Tomas Hoger
 Jonathan Hogg
 Kamilla Holanda
diff --git a/Misc/NEWS b/Misc/NEWS
index e2da905..16b33bc 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,9 @@
 Core and Builtins
 -----------------
 
+- Issue #21167: NAN operations are now handled correctly when python is
+  compiled with ICC even if -fp-model strict is not specified.
+
 - Issue #4395: Better testing and documentation of binary operators.
   Patch by Martin Panter.