Merge remote-tracking branch 'origin/pr/1818' into development

* origin/pr/1818:
  Move ChangeLog entry from Bugfix to Changes section
  Adapt ChangeLog
  Return from debugging functions if SSL context is unset
diff --git a/ChangeLog b/ChangeLog
index d81d732..5c66156 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -82,6 +82,8 @@
      due to an unacceptable hash signature. The certificate has been
      updated to one that is SHA-256 signed. Fix contributed by
      Illya Gerasymchuk.
+   * Return from various debugging routines immediately if the
+     provided SSL context is unset.
 
 = mbed TLS 2.16.0 branch released 2018-12-21