npt66: network prefix translation for ipv6

This is the initial commit of a NPTv6 (RFC6296) implementation for VPP.
It's restricted to a single internal to external binding and runs
as an output/input feature on the egress interface.

Type: feature
Change-Id: I0e3497af97f1ebd99377b84dbf599ecea935ca24
Signed-off-by: Ole Troan <otroan@employees.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index 84894a3..6e9b535 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -816,6 +816,11 @@
 M:      Mohammed Hawari <mohammed@hawari.fr>
 F:      src/plugins/bpf_trace_filter
 
+Plugin - NPTv6
+I:      npt66
+M:      Ole Troan <otroan@employees.org>
+F:      src/plugins/npt66
+
 cJSON
 I:	cjson
 M:	Ole Troan <ot@cisco.com>