Started release notes for iperf-3.5.
diff --git a/RELEASE_NOTES b/RELEASE_NOTES
index 45d94db..c69d878 100644
--- a/RELEASE_NOTES
+++ b/RELEASE_NOTES
@@ -1,3 +1,17 @@
+== iperf 3.5 2018-03-?? ==
+
+* Notable user-visible changes
+
+ * iperf3 no longer counts data received after the end of a test in
+ the bytecounts. This fixes a bug that could, under some
+ conditions, artificially inflate the transfer size and measured
+ bitrate. This bug was most noticeable on reverse direction
+ transfers on short tests over high-latency or buffer-bloated
+ paths. Many thanks to @FuzzyLogic for providing access to a test
+ environment for diagnosing this issue (#692).
+
+* Notable developer-visible changes
+
== iperf 3.4 2018-02-14 ==
* Notable user-visible changes
