Windows build:  update for 2.1a2, + get ucnhash out of the installer.
diff --git a/PCbuild/BUILDno.txt b/PCbuild/BUILDno.txt
index cd93561..34a9ffa 100644
--- a/PCbuild/BUILDno.txt
+++ b/PCbuild/BUILDno.txt
@@ -33,6 +33,8 @@
 
 Windows Python BUILD numbers
 ----------------------------
+  10    2.1a2
+        1-Feb-2001
    9    2.1a1
         17-Jan-2001
    8    2.0 (final)