Update changelog for the last few commits

ChangeLog

diff --git a/ChangeLog b/ChangeLog
index 7e47c45..9440e48 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -18,6 +18,7 @@
    * Fix net_accept() regarding non-blocking sockets (found by Luca Pesce).
    * ssl_read() could return non-application data records on server while
      renegotation was pending, and on client when a HelloRequest was received.
+   * Fix warnings from Clang's scan-build (contributed by Alfred Klomp).
 
 Changes
    * X.509 certificates with more than one AttributeTypeAndValue per