Tests: more Node.js tests.

test/node/header_name_case/app.js

@@ -0,0 +1,8 @@
+#!/usr/bin/env node
+
+require('unit-http').createServer(function (req, res) {
+    res.setHeader('X-Header', '1');
+    res.setHeader('X-header', '2');
+    res.setHeader('X-HEADER', '3');
+    res.end();
+}).listen(7080);