hook up the existing m2ua code into the ss7_link infrastructure
After this commit, it is possible to add #sigtran_link{type=m2ua}
using the osmo_ss7_sup:add_mtp_link() API.
The actual M2UA code appears to be incomplete at this point
diff --git a/ebin/osmo_ss7.app b/ebin/osmo_ss7.app
index fdf510f..4cb4f2a 100644
--- a/ebin/osmo_ss7.app
+++ b/ebin/osmo_ss7.app
@@ -16,6 +16,7 @@
sccp_codec,
osmo_ss7_sup, osmo_ss7_app,
ss7_links, ss7_link_m3ua, ss7_link_ipa_client,
+ ss7_link_m2ua,
ss7_routes,
ss7_service_dump,
osmo_ss7_gtt,