SF patch 517245 by Marc Recht.

Support GMP version >= 2.

Bugfix candidate.
diff --git a/Misc/ACKS b/Misc/ACKS
index 51780d8..28157a4 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -355,6 +355,7 @@
 Burton Radons
 Eric Raymond
 Edward K. Ream
+Marc Recht
 John Redford
 Terry Reedy
 Ofir Reichenberg