MT#58535 rtpp_flags: add to rtpengine-ng-client

Add rtpp_flags option to the rtpengine-ng-client

Change-Id: I39dc20f350bc4deb2ab141d8283fab6a78bc3191

utils/rtpengine-ng-client

@@ -97,6 +97,7 @@ my @string_opts = qw(
 	vsc-start-stop-rec
 	vsc-pause-resume-rec
 	vsc-start-pause-resume-rec
+	rtpp-flags
 );
 
 my @int_opts = qw(