added xilica-listen node

nodes/xilica-subscribe.html

@@ -133,7 +133,10 @@ RED.nodes.registerType('xilica-subscribe', {
   </div>
   <div class="form-row">
     <label for="node-input-transport">Transport</label>
-    <input type="text" id="node-input-transport" placeholder="TCP">
+    <select id="node-input-transport">
+      <option value="TCP">TCP</option>
+      <option value="UDP">UDP</option>
+    </select>
   </div>
 </script>
 
@@ -146,5 +149,6 @@ RED.nodes.registerType('xilica-subscribe', {
     <li><strong>Type ==</strong>: the Value field is used as a full control name (e.g. <code>MASTER_GAIN</code>).</li>
     <li><strong>Type Indexed</strong>: the Value field is a base string (e.g. <code>CH</code>), and the From/To fields define a numeric range (e.g. 1–48 → <code>CH1</code>…<code>CH48</code>).</li>
   </ul>
-  <p>The Transport field controls the subscription transport string, typically <code>TCP</code>. The node generates commands like <code>SUBSCRIBE CH1 "TCP"</code>.</p>
+  <p><strong>Transport</strong> selects the subscription transport (<code>TCP</code> or <code>UDP</code>). The node generates commands like <code>SUBSCRIBE CH1 "TCP"</code> or <code>SUBSCRIBE CH1 "UDP"</code>.</p>
+  <p>The actual Xilica device connection (IP/port/password) is chosen by the <code>xilica-command</code> node that this node is wired into, via its <code>xilica-connection</code> config.</p>
 </script>