Add 2.4.2 to LICENSE.
diff --git a/LICENSE b/LICENSE
index 275c86c..a013fb9 100644
--- a/LICENSE
+++ b/LICENSE
@@ -50,6 +50,7 @@
     2.3.5           2.3.4       2005        PSF         yes
     2.4             2.3         2004        PSF         yes
     2.4.1           2.4         2005        PSF         yes
+    2.4.2           2.4.1       2005        PSF         yes
 
 Footnotes: