add support for live call control

lib/http-routes/api/update-call.js

@@ -0,0 +1,22 @@
+const router = require('express').Router();
+const sysError = require('./error');
+const sessionTracker = require('../../session/session-tracker');
+
+router.post('/:callSid', async(req, res) => {
+  const logger = req.app.locals.logger;
+  const callSid = req.params.callSid;
+  logger.debug({body: req.body}, 'got upateCall request');
+  try {
+    const cs = sessionTracker.get(callSid);
+    if (!cs) {
+      logger.info(`updateCall: callSid not found ${callSid}`);
+      return res.sendStatus(404);
+    }
+    res.sendStatus(202);
+    cs.updateCall(req.body);
+  } catch (err) {
+    sysError(logger, res, err);
+  }
+});
+
+module.exports = router;