added local filtering of debug/high level messages

Author: sy-c

doc/releaseNotes.md

@@ -50,3 +50,6 @@ This file describes the main feature changes for each InfoLogger released versio
 
 ## v1.3.13 - 03/09/2020
 - added unsetFMQLogsToInfoLogger() function, to be called before destroying infoLogger handles used for FMQ redirection.
+
+## next version
+- added functions to discard locally (in client) messages with debug severity or high level. See filterDiscardDebug(), filterDiscardLevel() and filterReset().