Issue #11657: Fix sending file descriptors over 255 over a multiprocessing Pipe.
Also added some tests.
diff --git a/Misc/NEWS b/Misc/NEWS
index 6673d20..fca436c 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -22,6 +22,9 @@
 Library
 -------
 
+- Issue #11657: Fix sending file descriptors over 255 over a multiprocessing
+  Pipe.
+
 - Issue #12213: Fix a buffering bug with interleaved reads and writes that
   could appear on BufferedRandom streams.