include custom header X-Application-Sid to make it available to cdrs

lib/utils/place-outdial.js

@@ -67,7 +67,8 @@ class SingleDialer extends Emitter {
       ...opts.headers,
       ...(this.target.headers || {}),
       'X-Jambonz-Routing': this.target.type,
-      'X-Call-Sid': this.callSid
+      'X-Call-Sid': this.callSid,
+      ...(this.applicationSid && {'X-Application-Sid': this.applicationSid})
     };
     if (srf.locals.fsUUID) {
       opts.headers = {