[api] Integrated a little more from Mikeal to make our return headers consistent

lib/node-http-proxy.js

@@ -81,7 +81,6 @@ var createProxy = function () {
     server.emit('route', req, res, function (port, hostname) {
       var p = manager.getPool(port, hostname);    
       
-      req.headers.Connection = req.headers.Connection || 'close';
       p.request(req.method, req.url, req.headers, function (reverse_proxy) {
         var data = '';
         reverse_proxy.on('error', function (err) {
@@ -113,6 +112,11 @@ var createProxy = function () {
 
         // Add a listener for the reverse_proxy response event
         reverse_proxy.addListener('response', function (response) {
+          if (response.headers.connection) {
+            if (req.headers.connection) response.headers.connection = req.headers.connection;
+            else response.headers.connection = 'close';
+          }
+          
           // These two listeners are for testability and observation
           // of what's passed back from the target server
           response.addListener('data', function (chunk) {