Tests: more Node.js tests.

test/node/header_name_valid/app.js

@@ -0,0 +1,7 @@
+#!/usr/bin/env node
+
+require('unit-http').createServer(function (req, res) {
+    res.writeHead(200, {});
+    res.setHeader('@$', 'test');
+    res.end();
+}).listen(7080);