Update rtpengine.init

Refactoring $RTP_IP/$RTP_IP6 so we can use a number of parameters for --interface command line

el/rtpengine.init

@@ -58,25 +58,21 @@ build_opts() {
 
         if [[ -n "$RTP_IP" ]]
         then
-		OPTS+=" --interface=$RTP_IP"
+                for IP in "${RTP_IP[@]}"
-	fi
+                do
-
+                        OPTS+=" --interface=$IP"
-	if [[ -n "$RTP_ADV_IP" ]]
+                done
-	then
-		OPTS+="!$RTP_ADV_IP"
         fi
 
         if [[ -n "$RTP_IP6" ]]
         then
-		OPTS+=" --interface=$RTP_IP6"
+                for IP6 in "${RTP_IP6[@]}"
+                do
+                        OPTS+=" --interface=$IP6"
+                done
                 IP6=1
         fi
 
-	if [[ -n "$RTP_ADV_IP6" ]]
-	then
-		OPTS+="!$RTP_ADV_IP6"
-	fi
-
 	if [[ -n "$LISTEN_TCP" ]]
 	then
 		OPTS+=" --listen-tcp=$LISTEN_TCP"