Patch #1635058 by Mark Roberts: ensure that htonl and friends never accept or
return negative numbers, per the underlying C implementation.
diff --git a/Misc/ACKS b/Misc/ACKS
index b198114..7ea63cc 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -521,6 +521,7 @@
 Nicholas Riley
 Jean-Claude Rimbault
 Anthony Roach
+Mark Roberts
 Andy Robinson
 Jim Robinson
 Kevin Rodgers