document changes for 0.7.1
diff --git a/WHATSNEW b/WHATSNEW
index 519b778..d4b4a0f 100644
--- a/WHATSNEW
+++ b/WHATSNEW
@@ -70,3 +70,12 @@
 
 implemented many small missing functions here and there, minor header
 fixes, etc.
+
+
+
+0.7.1 - improvements to completeness, bug fixes
+
+implemented flockfile, wprintf, and robust mutex functions.
+
+fixed stack corruption bug in times(), minor header bugs, and some
+error return value bugs in thread interfaces.