Adds a disco feature to distinguish jibri participants.

connection.js

@@ -15,6 +15,13 @@ import {
 
 const logger = require('jitsi-meet-logger').getLogger(__filename);
 
+/**
+ * The feature announced so we can distinguish jibri participants.
+ *
+ * @type {string}
+ */
+export const DISCO_JIBRI_FEATURE = 'http://jitsi.org/protocol/jibri';
+
 /**
  * Checks if we have data to use attach instead of connect. If we have the data
  * executes attach otherwise check if we have to wait for the data. If we have
@@ -91,6 +98,10 @@ function connect(id, password, roomName) {
             jwt && issuer && issuer !== 'anonymous' ? jwt : undefined,
             connectionConfig);
 
+    if (config.iAmRecorder) {
+        connection.addFeature(DISCO_JIBRI_FEATURE);
+    }
+
     return new Promise((resolve, reject) => {
         connection.addEventListener(
             JitsiConnectionEvents.CONNECTION_ESTABLISHED,