add section on changes from 1.5 to 1.6

diff --git a/NEWS b/NEWS
index c92c4a95071ec30666ed1ebb9f3c89bb652925a5..3200dcb2658bf6e8a58626248a3c03b8226830e8 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,18 @@
+#####################################
+Major Changes between 1.6.x and 1.6.x
+-------------------------------------
+API
+---
+* librrd_th is gone. librrd is now fully thread-safe
+
+RRD Graph
+---------
+* new CDEF function SMIN: a,b,c,3,SMIN -> min(a,b,c)
+* new CDEF function SMAX: a,b,c,3,SMAX -> max(a,b,c)
+* new CDEF function STDEV: a,b,c,3,STDEV -> stdev(a,b,c)
+* new CDEF function POW: a,b,POW -> a**b
+* new CDEF function PERCENT: a,b,c,95,3,PERCENT -> find 95percentile of a,b,c
+
 #####################################
 Major Changes between 1.4.x and 1.5.x
 -------------------------------------