Update comments about mpz, pointing to gmpy and mxNumber rather than
to the non-existing pympz (did that ever exist?).
diff --git a/setup.py b/setup.py
index f529032..28a1a7c 100644
--- a/setup.py
+++ b/setup.py
@@ -431,8 +431,10 @@
# You need to ftp the GNU MP library.
# This was originally written and tested against GMP 1.2 and 1.3.2.
# It has been modified by Rob Hooft to work with 2.0.2 as well, but I
- # haven't tested it recently. For a more complete module,
- # refer to pympz.sourceforge.net.
+ # haven't tested it recently, and it definitely doesn't work with
+ # GMP 4.0. For more complete modules, refer to
+ # http://gmpy.sourceforge.net and
+ # http://www.egenix.com/files/python/mxNumber.html
# A compatible MP library unencumbered by the GPL also exists. It was
# posted to comp.sources.misc in volume 40 and is widely available from