ONOS-1479 -- GUI - augmenting topology view for extensibility: WIP.

Change-Id: I11820a9ff8f446c0d10a0311cee5ce448c15f402
diff --git a/web/gui/src/main/webapp/app/fw/svg/glyph.js b/web/gui/src/main/webapp/app/fw/svg/glyph.js
index b00f81d..838a2ac 100644
--- a/web/gui/src/main/webapp/app/fw/svg/glyph.js
+++ b/web/gui/src/main/webapp/app/fw/svg/glyph.js
@@ -45,6 +45,10 @@
             "C429.9,285.5,426.7,293.2,427.7,300.4z"
         },
 
+    // TODO: ONOS-2566 glyphs for device types:
+    //          otn, roadm_otn, firewall, balancer, ips, ids,
+    //          controller, virtual, fiber_switch, other
+
         glyphDataSet = {
             _viewbox: "0 0 110 110",