Added tag info for 2.01
diff --git a/HISTORY.txt b/HISTORY.txt
index e229a09..819e933 100644
--- a/HISTORY.txt
+++ b/HISTORY.txt
@@ -3,6 +3,7 @@ FTGL 2.02 (FTGL_2_0_2)
- Fixed memory leaks
14 March 2003
+ 2.01 (FTGL_2_0_1)
- Minor changes to autoconf to detect glu
11 March 2003