ZT_TRACE fix.

node/Packet.cpp

@@ -40,6 +40,7 @@ const char *Packet::verbString(Verb v)
 		case VERB_MULTICAST_LIKE: return "MULTICAST_LIKE";
 		case VERB_NETWORK_CREDENTIALS: return "NETWORK_CREDENTIALS";
 		case VERB_NETWORK_CONFIG_REQUEST: return "NETWORK_CONFIG_REQUEST";
+		case VERB_NETWORK_CONFIG_REFRESH: return "NETWORK_CONFIG_REFRESH";
 		case VERB_MULTICAST_GATHER: return "MULTICAST_GATHER";
 		case VERB_MULTICAST_FRAME: return "MULTICAST_FRAME";
 		case VERB_PUSH_DIRECT_PATHS: return "PUSH_DIRECT_PATHS";