turned the redirect thing into a loadable host_redirect middleware

middleware/host_redirect.js

@@ -0,0 +1,16 @@
+(function() {
+
+  module.exports = function(redirect_map) {
+    if (redirect_map == null) redirect_map = {};
+    return function(req, res, next) {
+      var host;
+      host = req.header('Host');
+      if (redirect_map[host]) {
+        return res.redirect(redirect_map[host]);
+      } else {
+        return next();
+      }
+    };
+  };
+
+}).call(this);