tracenode: filtering feature

In order to be able to filter on encapsulated packet, a new node
has been added to the ip4/6-unicast arcs.

Type: feature
Change-Id: I1e8ee05bc6d0fce20cadd8319c81bab260c17d21
Signed-off-by: Maxime Peim <mpeim@cisco.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index cb09e30..167da0f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -826,6 +826,11 @@
 M:      Ole Troan <otroan@employees.org>
 F:      src/plugins/npt66
 
+Plugin - Trace node
+I:	tracenode
+M:	Maxime Peim <mpeim@cisco.com>
+F:	src/plugins/tracenode
+
 cJSON
 I:	cjson
 M:	Ole Troan <ot@cisco.com>