As a consequence of the BIGNUM constification, the ENGINE code needs a
few small constifying changes, and why not throw in a couple of extras
while I'm at it?
diff --git a/CHANGES b/CHANGES
index 60af919..916c073 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4,6 +4,9 @@
 
  Changes between 0.9.6 and 0.9.7  [xx XXX 2000]
 
+  *) Constify the ENGINE code as a result of BIGNUM constification.
+     [Richard Levitte]
+
   *) Make it so the openssl application has all engines loaded by default.
      [Richard Levitte]