Avoid downloading from subsubdomains like ide.newclient-lennnartcl.c9.io

Since these don't have a valid certificate, they don't support caching

plugins/c9.static/unpacked_helper.js

@@ -17,21 +17,21 @@ function plugin(options, imports, register) {
     var apiBaseUrl = options.apiBaseUrl;
     var vfsBaseUrl = options.vfsBaseUrl;
     
-    connectStatic.getRequireJsConfig().baseUrlLoadBalancers = [
-        ideBaseUrl,
+    var balancers = [
         baseUrl + "/uph",
-        // We could include others but dogfooding URLs like
-        // vfs.newclient-lennartcl.c9.io don't have a cert, so
-        // let's not
-        // apiBaseUrl + "/uph",
-        // vfsBaseUrl + "/uph",
     ];
-    assert(connectStatic.getRequireJsConfig().baseUrlLoadBalancers);
+    if (!options.avoidSubdomains)
+        balancers.push(
+            ideBaseUrl
+            // We could include others but dogfooding URLs like
+            // vfs.newclient-lennartcl.c9.io don't have a cert, so
+            // let's not
+            // apiBaseUrl + "/uph",
+            // vfsBaseUrl + "/uph"
+        );
     
-    function cacheForever(req, res, next) {
-        res.setHeader("Cache-Control", "public, max-age=31556926");
-        next();
-    }
+    connectStatic.getRequireJsConfig().baseUrlLoadBalancers = balancers;
+    assert(connectStatic.getRequireJsConfig().baseUrlLoadBalancers);
     
     register(null, {
         "unpacked_helper": {}