Merge pull request http-party#967 from jbacklund/patch-1

Set the x-forwarded-host flag when xfwd is enabled

Author: jcrugzz

lib/http-proxy/passes/web-incoming.js

@@ -78,6 +78,8 @@ web_o = Object.keys(web_o).map(function(pass) {
         (req.headers['x-forwarded-' + header] ? ',' : '') +
         values[header];
     });
+    
+    req.headers['x-forwarded-host'] = req.headers['host'];
   },
 
   /**