add note explaining what a release candidate is
diff --git a/Misc/NEWS b/Misc/NEWS
index 8c68529..e7534fa 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -17,6 +17,16 @@
What's new in 2.0 release candidate 1 (since beta 2)?
=====================================================
+What is release candidate 1?
+
+We believe that release candidate 1 will fix all known bugs that we
+intend to fix for the 2.0 final release. This release should be a bit
+more stable than the previous betas. We would like to see even more
+widespread testing before the final release, so we are producing this
+release candidate. The final release will be exactly the same unless
+any show-stopping (or brown bag) bugs are found by testers of the
+release candidate.
+
All the changes since the last beta release are bug fixes or changes
to build support for specific platforms.